add some more descriptions for fixes to list of style in fix command docs

accelerated styles exist.

"adapt"_fix_adapt.html - change a simulation parameter over time

"adapt/fep"_fix_adapt_fep.html -

"adapt/fep"_fix_adapt_fep.html - enhanced version of fix adapt

"addforce"_fix_addforce.html - add a force to each atom

"addtorque"_fix_addtorque.html -

"addtorque"_fix_addtorque.html - add a torque to a group of atoms

"append/atoms"_fix_append_atoms.html - append atoms to a running simulation

"atc"_fix_atc.html - initiates a coupled MD/FE simulation

"atom/swap"_fix_atom_swap.html - Monte Carlo atom type swapping

"ave/correlate"_fix_ave_correlate.html - compute/output time correlations

"ave/correlate/long"_fix_ave_correlate_long.html -

"ave/histo"_fix_ave_histo.html - compute/output time-averaged histograms

"ave/histo/weight"_fix_ave_histo.html -

"ave/histo/weight"_fix_ave_histo.html - weighted version of fix ave/histo

"ave/time"_fix_ave_time.html - compute/output global time-averaged quantities

"aveforce"_fix_aveforce.html - add an averaged force to each atom

"balance"_fix_balance.html - perform dynamic load-balancing

"bocs"_fix_bocs.html -

"bocs"_fix_bocs.html - NPT style time integration with pressure correction

"bond/break"_fix_bond_break.html - break bonds on the fly

"bond/create"_fix_bond_create.html - create bonds on the fly

"bond/react"_fix_bond_react.html -

"bond/react"_fix_bond_react.html - apply topology changes to model reactions

"bond/swap"_fix_bond_swap.html - Monte Carlo bond swapping

"box/relax"_fix_box_relax.html - relax box size during energy minimization

"client/md"_fix_client_md.html -

"client/md"_fix_client_md.html - MD client for client/server simulations

"cmap"_fix_cmap.html - enables CMAP cross-terms of the CHARMM force field

"colvars"_fix_colvars.html - interface to the collective variables “Colvars” library

"controller"_fix_controller.html - 

"controller"_fix_controller.html - apply control loop feedback mechanism

"deform"_fix_deform.html - change the simulation box size/shape

"deposit"_fix_deposit.html - add new atoms above a surface

"dpd/energy"_fix_dpd_energy.html - constant energy dissipative particle dynamics

"drag"_fix_drag.html - drag atoms towards a defined coordinate

"drude"_fix_drude.html -

"drude/transform/direct"_fix_drude_transform.html -

"drude/transform/inverse"_fix_drude_transform.html -

"drude"_fix_drude.html - part of Drude oscillator polarization model

"drude/transform/direct"_fix_drude_transform.html -  part of Drude oscillator polarization model

"drude/transform/inverse"_fix_drude_transform.html -  part of Drude oscillator polarization model

"dt/reset"_fix_dt_reset.html - reset the timestep based on velocity, forces

"edpd/source"_fix_dpd_source.html -

"edpd/source"_fix_dpd_source.html - add heat source to eDPD simulations

"efield"_fix_efield.html - impose electric field on system

"ehex"_fix_ehex.html - enhanced heat exchange algorithm

"electron/stopping"_fix_electron_stopping.html - electronic stopping power as a friction force

"evaporate"_fix_evaporate.html - remove atoms from simulation periodically

"external"_fix_external.html - callback to an external driver program

"ffl"_fix_ffl.html - apply a Fast-Forward Langevin equation thermostat

"filter/corotate"_fix_filter_corotate.html -

"flow/gauss"_fix_flow_gauss.html -

"filter/corotate"_fix_filter_corotate.html - implement corotation filter to allow larger timesteps with r-RESPA

"flow/gauss"_fix_flow_gauss.html - Gaussian dynamics for constant mass flux

"freeze"_fix_freeze.html - freeze atoms in a granular simulation

"gcmc"_fix_gcmc.html - grand canonical insertions/deletions

"gld"_fix_gld.html - generalized Langevin dynamics integrator

"hyper/local"_fix_hyper_local.html - local hyperdynamics

"imd"_fix_imd.html - implements the “Interactive MD” (IMD) protocol 

"indent"_fix_indent.html - impose force due to an indenter

"ipi"_fix_ipi.html -

"ipi"_fix_ipi.html - enable LAMMPS to run as a client for i-PI path-integral simulations

"langevin"_fix_langevin.html - Langevin temperature control

"langevin/drude"_fix_langevin_drude.html - Langevin temperature control of Drude oscillators

"langevin/eff"_fix_langevin_eff.html - Langevin temperature control for the electron force field model

"lb/rigid/pc/sphere"_fix_lb_rigid_pc_sphere.html -

"lb/viscous"_fix_lb_viscous.html -

"lineforce"_fix_lineforce.html - constrain atoms to move in a line

"manifoldforce"_fix_manifoldforce.html -

"meso"_fix_meso.html -

"manifoldforce"_fix_manifoldforce.html - restrain atoms to a manifold during minimization

"meso"_fix_meso.html - time integration for SPH/DPDE particles

"meso/move"_fix_meso_move.html - move mesoscopic SPH/SDPD particles in a prescribed fashion

"meso/stationary"_fix_meso_stationary.html -

"momentum"_fix_momentum.html - zero the linear and/or angular momentum of a group of atoms

"move"_fix_move.html - move atoms in a prescribed fashion

"mscg"_fix_mscg.html -

"mscg"_fix_mscg.html - apply MSCG method for force-matching to generate coarse grain models

"msst"_fix_msst.html - multi-scale shock technique (MSST) integration

"mvv/dpd"_fix_mvv_dpd.html - DPD using the modified velocity-Verlet integration algorithm

"mvv/edpd"_fix_mvv_dpd.html - constant energy DPD using the modified velocity-Verlet algrithm

"npt/body"_fix_npt_body.html - NPT for body particles

"npt/eff"_fix_nh_eff.html - NPT for  nuclei and electrons in the electron force field model

"npt/sphere"_fix_npt_sphere.html - NPT for spherical particles

"npt/uef"_fix_nh_uef.html -

"npt/uef"_fix_nh_uef.html - NPT style time integration with diagonal flow

"nve"_fix_nve.html - constant NVE time integration

"nve/asphere"_fix_nve_asphere.html - NVE for aspherical particles

"nve/asphere/noforce"_fix_nve_asphere_noforce.html - NVE for aspherical particles without forces

"nve/awpmd"_fix_nve_awpmd.html - NVE for the Antisymmetrized Wave Packet Molecular Dynamics model

"nve/body"_fix_nve_body.html - NVE for body particles

"nve/dot"_fix_nve_dot.html -

"nve/dotc/langevin"_fix_nve_dotc_langevin.html -

"nve/dot"_fix_nve_dot.html - rigid body constant energy time integrator for coarse grain models

"nve/dotc/langevin"_fix_nve_dotc_langevin.html - Langevin style rigid body time integrator for coarse grain models

"nve/eff"_fix_nve_eff.html - NVE for  nuclei and electrons in the electron force field model

"nve/limit"_fix_nve_limit.html - NVE with limited step length

"nve/line"_fix_nve_line.html - NVE for line segments

"nvt/sllod"_fix_nvt_sllod.html - NVT for NEMD with SLLOD equations

"nvt/sllod/eff"_fix_nvt_sllod_eff.html - NVT for NEMD with SLLOD equations for the electron force field model

"nvt/sphere"_fix_nvt_sphere.html - NVT for spherical particles

"nvt/uef"_fix_nh_uef.html -

"nvt/uef"_fix_nh_uef.html - NVT style time integration with diagonal flow

"oneway"_fix_oneway.html - constrain particles on move in one direction

"orient/bcc"_fix_orient.html - add grain boundary migration force for BCC

"orient/fcc"_fix_orient.html - add grain boundary migration force for FCC

"phonon"_fix_phonon.html -

"phonon"_fix_phonon.html - calculate dynamical matrix from MD simulations

"pimd"_fix_pimd.html - Feynman path integral molecular dynamics

"planeforce"_fix_planeforce.html - constrain atoms to move in a plane

"plumed"_fix_plumed.html - wrapper on PLUMED free energy library

"press/berendsen"_fix_press_berendsen.html - pressure control by Berendsen barostat

"print"_fix_print.html - print text and variables during a simulation

"property/atom"_fix_property_atom.html - add customized per-atom values

"python/invoke"_fix_python_invoke.html -

"python/invoke"_fix_python_invoke.html - call a Python function during a simulation

"python/move"_fix_python_move.html -  call a Python function during a simulation run

"qbmsst"_fix_qbmsst.html -

"qbmsst"_fix_qbmsst.html - quantum bath multi-scale shock technique time integrator

"qeq/comb"_fix_qeq_comb.html - charge equilibration for COMB potential

"qeq/dynamic"_fix_qeq.html - charge equilibration via dynamic method

"qeq/fire"_fix_qeq.html - charge equilibration via FIRE minimizer

"qeq/shielded"_fix_qeq.html - charge equilibration via shielded method

"qeq/slater"_fix_qeq.html - charge equilibration via Slater method

"qmmm"_fix_qmmm.html - functionality to enable a quantum mechanics/molecular mechanics coupling

"qtb"_fix_qtb.html -

"qtb"_fix_qtb.html - implement quantum thermal bath scheme

"rattle"_fix_shake.html - RATTLE constraints on bonds and/or angles

"reax/c/bonds"_fix_reaxc_bonds.html - write out ReaxFF bond information

"reax/c/species"_fix_reaxc_species.html - write out ReaxFF molecule information

"recenter"_fix_recenter.html - constrain the center-of-mass position of a group of atoms

"restrain"_fix_restrain.html - constrain a bond, angle, dihedral

"rhok"_fix_rhok.html -

"rhok"_fix_rhok.html - add bias potential for long-range ordered systems

"rigid"_fix_rigid.html - constrain one or more clusters of atoms to move as a rigid body with NVE integration

"rigid/meso"_fix_rigid_meso.html - constrain clusters of mesoscopic SPH/SDPD particles to move as a rigid body

"rigid/nph"_fix_rigid.html - constrain one or more clusters of atoms to move as a rigid body with NPH integration

"setforce"_fix_setforce.html - set the force on each atom

"shake"_fix_shake.html - SHAKE constraints on bonds and/or angles

"shardlow"_fix_shardlow.html - integration of DPD equations of motion using the Shardlow splitting

"smd"_fix_smd.html -

"smd"_fix_smd.html - applied a steered MD force to a group

"smd/adjust_dt"_fix_smd_adjust_dt.html -

"smd/integrate_tlsph"_fix_smd_integrate_tlsph.html -

"smd/integrate_ulsph"_fix_smd_integrate_ulsph.html -

"ti/spring"_fix_ti_spring.html -

"tmd"_fix_tmd.html - guide a group of atoms to a new configuration

"ttm"_fix_ttm.html - two-temperature model for electronic/atomic coupling

"ttm/mod"_fix_ttm.html -

"ttm/mod"_fix_ttm.html - enhanced two-temperature model with additional options

"tune/kspace"_fix_tune_kspace.html - auto-tune KSpace parameters

"vector"_fix_vector.html - accumulate a global vector every N timesteps

"viscosity"_fix_viscosity.html - Muller-Plathe momentum exchange for viscosity calculation

"wall/body/polygon"_fix_wall_body_polygon.html -

"wall/body/polyhedron"_fix_wall_body_polyhedron.html -

"wall/colloid"_fix_wall.html - Lennard-Jones wall interacting with finite-size particles

"wall/ees"_fix_wall_ees.html -

"wall/ees"_fix_wall_ees.html - wall for ellipsoidal particles

"wall/gran"_fix_wall_gran.html - frictional wall(s) for granular simulations

"wall/gran/region"_fix_wall_gran_region.html -

"wall/harmonic"_fix_wall.html - harmonic spring wall

"wall/piston"_fix_wall_piston.html - moving reflective piston wall

"wall/reflect"_fix_wall_reflect.html - reflecting wall(s)

"wall/region"_fix_wall_region.html - use region surface as wall

"wall/region/ees"_fix_wall_ees.html -

"wall/region/ees"_fix_wall_ees.html - use region surface as wall for ellipsoidal particles

"wall/srd"_fix_wall_srd.html - slip/no-slip wall for SRD particles :ul

[Restrictions:]