Migrate the Vinagre help to Mallard format. Attach the result both here and in the corresponding Bugzilla report.

Links: bug report; http://projectmallard.org/; #docs channel on irc.gnome.org and/or gnome-doc-list mailing list; Introduction to Git

Primary contact: Jonh Wendell. I'm Vinagre maintainer, but I know nothing about documentation itself.