Log Message:
Depend on newer libssh. As these packages need libssh >= 0.4 anyway (per
own build docs), this actually makes remmina offer ssh and sftp, and makes
the NX plugin build. Thus bumping revision.

XXX TODO:
XXX - RDP still isn't offered in the menu.
XXX - upstream package is 1.0

Thanks to Noud Brouwer for the original libssh-0.5.4 package from
pkgsrc-wip, which was used as security/libssh with some corrections.