Bug#410558: freeciv-client-gtk: Does always want to connect to localhost

[Jacob Nevins]

Since gna.org has gone away, for the record: this will be addressed in
2.6 when it is released; there is a client option to remember the last
server connected to, although it is disabled by default.

Archived upstream Gna ticket state:
<https://web.archive.org/web/https://gna.org/bugs/?21752>
Commit that fixes this:
<https://github.com/freeciv/freeciv/commit/cbe0a10ec17dd2521863a1300033756ad21e7c90>