Update libssh2 to 1.8.0
Update libssh2 to 1.8.0
dleehr/objective-git,phatblat/objective-git,libgit2/objective-git,tiennou/objective-git,alehed/objective-git,dleehr/objective-git,alehed/objective-git,blackpixel/objective-git,phatblat/objective-git,libgit2/objective-git,libgit2/objective-git,tiennou/objective-git,libgit2/objective-git,dleehr/objective-git,tiennou/objective-git,blackpixel/objective-git,dleehr/objective-git,alehed/objective-git,phatblat/objective-git,blackpixel/objective-git,blackpixel/objective-git