Remove expired ports:
2018-12-31 net/libsrtp: Superseded by libsrtp2
2018-12-31 x11-toolkits/wlc: Deprecated upstream
2018-12-31 japanese/spamassassin: does not build
2018-12-31 www/spdylay: SPDY is deprecated, use HTTP/2 instead
2018-12-31 www/moodle33: Upstream no longer maintained
2018-12-31 security/krb5-114: EOL twelve months after release of krb5-1.16
2018-12-31 databases/mongodb32: EOL upstream since September 2018
2018-12-31 databases/mongodb32-tools: EOL upstream since September 2018
2018-12-31 audio/creox: Qt4 has been EOL since december 2015
2018-12-31 audio/terminatorx: Unmaintained, broken too often
2018-12-31 audio/shoutcast: Upstream vendor no longer provides releases
2018-12-31 dns/powerdns-recursor40: FreeBSD 10.3 has reached EoL since 2018-04-30; users should upgrade and use dns/powerdns-recursor instead
2018-12-31 sysutils/ataidle: obsoleted by camcontrol(8)
2018-12-31 sysutils/syslog-ng37: No longer officially supported by Balabit, does not support openssl111
2018-12-31 sysutils/cfengine22: No longeer supported by cfengine.com
2018-12-31 sysutils/syslog-ng36: No longer officially supported by Balabit, does not support openssl111