cmake: Add FindGSSAPI.cmake
cmake: Add FindGSSAPI.cmake

Reviewed-by: Andreas Schneider <5be00ddc76278cf6077f5047ca3384a88460c671@cryptomilk.org>

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