Log Message:
Upgrade to fstrm version 0.5.0.

Pkgsrc changes:
 * Update license to "mit", to track upstream.

Upstream changes:
 * Change license to modern MIT license for compatibility with
   GPLv2 software.
 * src/fstrm_replay.c: For OpenBSD and Posix portability include
   netinet/in.h and sys/socket.h to get struct sockaddr_in and the
   AF_* defines respectively.
 * Fix various compiler warnings.