Merge branch 'master' into int-new

for control socket is /usr/local/var/run/bird.ctl . You can change that

by --sysconfdir and --localstatedir configure options.

To compile current development BIRD source code from Git repository, you

also need Git (to download the source code) and Autoconf (to generate

the configure script and associated files using 'autoreconf' tool):

$ git clone git://git.nic.cz/bird.git

$ cd bird

$ autoreconf

Then continue as in usual installation above.

Requirements

============

For compiling BIRD you need these programs and libraries:

 - GNU C Compiler

 - GNU C Compiler (or LLVM Clang)

 - GNU Make

 - GNU Bison

 - GNU M4

esac

AC_CHECK_HEADERS_ONCE([alloca.h syslog.h])

AC_CHECK_MEMBERS([struct sockaddr.sa_len], [], [], [#include <sys/socket.h>])

AC_CHECK_HEADER([linux/lwtunnel.h], [AC_DEFINE([HAVE_LWTUNNEL], [1], [Define to 1 if you have the <linux/lwtunnel.h> header file.])])

AC_CHECK_MEMBERS([struct rtvia.rtvia_family], [AC_DEFINE([HAVE_STRUCT_RTVIA], [1], [Define to 1 if you have rtvia structure.])],,[#include <linux/rtnetlink.h>])

AC_MSG_CHECKING(whether 'struct sockaddr' has sa_len)

AC_COMPILE_IFELSE([

  AC_LANG_PROGRAM(

    [[

      #include <sys/types.h>

      #include <sys/socket.h>

    ]],

    [[

      static struct sockaddr sa;

      int i = sizeof(sa.sa_len);

    ]]

  )],

  [

    AC_MSG_RESULT(yes)

    AC_DEFINE(HAVE_SIN_LEN,,sin_len)

  ],

  [AC_MSG_RESULT(no)]

)

AC_C_BIGENDIAN(

  [AC_DEFINE([CPU_BIG_ENDIAN], [1], [Define to 1 if cpu is big endian])],

  [AC_DEFINE([CPU_LITTLE_ENDIAN], [1], [Define to 1 if cpu is little endian])],

sockaddr_fill4(struct sockaddr_in *sa, ip_addr a, uint port)

{

  memset(sa, 0, sizeof(struct sockaddr_in));

#ifdef HAVE_SIN_LEN

#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN

  sa->sin_len = sizeof(struct sockaddr_in);

#endif

  sa->sin_family = AF_INET;