modules: clarify CONFIG_MODULE_COMPRESS help, suggest 'N'.

	bool "Compress modules on installation"

	depends on MODULES

	help

	  This option compresses the kernel modules when 'make

	  modules_install' is run.

	  The modules will be compressed either using gzip or xz depend on the

	  choice made in "Compression algorithm".

	  Compresses kernel modules when 'make modules_install' is run; gzip or

	  xz depending on "Compression algorithm" below.

	  module-init-tools has support for gzip format while kmod handle gzip

	  and xz compressed modules.

	  module-init-tools MAY support gzip, and kmod MAY support gzip and xz.

	  When a kernel module is installed from outside of the main kernel

	  source and uses the Kbuild system for installing modules then that

	  kernel module will also be compressed when it is installed.

	  Out-of-tree kernel modules installed using Kbuild will also be

	  compressed upon installation.

	  This option provides little benefit when the modules are to be used inside

	  an initrd or initramfs, it generally is more efficient to compress the whole

	  initrd or initramfs instead.

	  Note: for modules inside an initrd or initramfs, it's more efficient

	  to compress the whole initrd or initramfs instead.

	  This is fully compatible with signed modules while the signed module is

	  compressed. module-init-tools or kmod handles decompression and provide to

	  other layer the uncompressed but signed payload.

	  Note: This is fully compatible with signed modules.

	  If in doubt, say N.

choice

	prompt "Compression algorithm"