Merge from vendor branch TNF:

Merge from vendor branch TNF:
Import Remmina 0.9.3 as net/remmina

Remmina is a remote desktop client written in GTK+, aiming to be
useful for system administrators and travellers, who need to
work with lots of remote computers in front of either large
monitors or tiny netbooks. Remmina supports multiple network
protocols in an integrated and consistant user interface.
Currently RDP, VNC, NX, XDMCP and SSH are supported.