messages: Split ssh_execute_server_callbacks() in small functions.
messages: Split ssh_execute_server_callbacks() in small functions.

mwgoldsmith/libssh,elastichosts/libssh,mwgoldsmith/ssh,robxu9/libssh,elastichosts/libssh,Distrotech/libssh,sebadoom/libssh,mwgoldsmith/libssh,wangshawn/libssh,Distrotech/libssh,taikoo/libssh,Distrotech/libssh,nviennot/libssh,taikoo/libssh,kedazo/libssh,pouete/libssh,pouete/libssh,kedazo/libssh,mwgoldsmith/ssh,sebadoom/libssh,mwgoldsmith/libssh,robxu9/libssh,nviennot/libssh,elastichosts/libssh,DouglasHeriot/libssh,mwgoldsmith/ssh,pouete/libssh,DouglasHeriot/libssh,bigcat26/libssh-mod,kedazo/libssh,wangshawn/libssh,bigcat26/libssh-mod,sebadoom/libssh,nviennot/libssh,bigcat26/libssh-mod,robxu9/libssh,wangshawn/libssh,DouglasHeriot/libssh,robxu9/libssh,pouete/libssh,taikoo/libssh,taikoo/libssh,Distrotech/libssh,nviennot/libssh,sebadoom/libssh,bigcat26/libssh-mod,DouglasHeriot/libssh,wangshawn/libssh,mwgoldsmith/ssh,mwgoldsmith/libssh,kedazo/libssh