Wolfpack Empire 4.3.1 released

This release fixes security holes and abusable bugs.

Deities are urged to use this release for new games. Upgrading mid-game is normally not supported, but upgrading from 4.3.0 to 4.3.1 is.

There is no separate client release 4.3.1, as the client did not change since 4.3.0.

Our pthreads code has known problems with shutdown. In particular, the shutdown command may fail to terminate the server process. Note that configure prefers LWP over pthreads when both are available, as they are on most platforms.

Solaris /bin/sh has a broken test builtin. Try passing SHELL=/usr/xpg4/bin/sh PATH=/usr/xpg4/bin:$PATH to make.