Improve ssh_options_default_username().
Improve ssh_options_default_username().


git-svn-id: b1dee0d48e635e16c3b356ce77271b225d4db9f7@360 7dcaeef0-15fb-0310-b436-a5af3365683c

Distrotech/libssh,mwgoldsmith/ssh,kedazo/libssh,substack/libssh,wangshawn/libssh,miloj/libssh-v0.5,DouglasHeriot/libssh,bigcat26/libssh-mod,substack/libssh,wangshawn/libssh,elastichosts/libssh,robxu9/libssh,wangshawn/libssh,sebadoom/libssh,miloj/libssh-v0.5,mwgoldsmith/ssh,mwgoldsmith/ssh,elastichosts/libssh,Distrotech/libssh,nviennot/libssh,Distrotech/libssh,rofl0r/libssh,kedazo/libssh,pouete/libssh,Distrotech/libssh,robxu9/libssh,jahrome/libssh,nviennot/libssh,sebadoom/libssh,rofl0r/libssh,mwgoldsmith/libssh,mwgoldsmith/libssh,elastichosts/libssh,taikoo/libssh,DouglasHeriot/libssh,nviennot/libssh,miloj/libssh-v0.5,jahrome/libssh,rofl0r/libssh,bigcat26/libssh-mod,kedazo/libssh,jahrome/libssh,mwgoldsmith/libssh,DouglasHeriot/libssh,mwgoldsmith/libssh,taikoo/libssh,robxu9/libssh,jt1/honeypot-libssh,jahrome/libssh,pouete/libssh,kedazo/libssh,substack/libssh,taikoo/libssh,taikoo/libssh,sebadoom/libssh,robxu9/libssh,jt1/honeypot-libssh,nviennot/libssh,wangshawn/libssh,pouete/libssh,miloj/libssh-v0.5,sebadoom/libssh,bigcat26/libssh-mod,jt1/honeypot-libssh,pouete/libssh,jt1/honeypot-libssh,bigcat26/libssh-mod,rofl0r/libssh,substack/libssh,mwgoldsmith/ssh,DouglasHeriot/libssh