mrouted v3.9.7

Changes & New Features

• SNMP Support removed. It never compiled and would have likely
  needed a complete refactor to support modern AgentX.
• Replaced static config.mk with configure script from pimd
• RSRR Support disabled by default, use --enable-rsrr to configure script
• Add support for starting with mrouted disabled on all interfaces, or with
  some interfaces missing at startup. Use 'enable' to phyint directive and
  -M/-N command line options to control this behavior. Feature thanks to
  Joseph Gooch (@goochjj)
• Add David Waitzman and Craig Partridge to list of original authors
  after being contacted by Mr Waitzman :)
• Change to use stdint.h types instead of type unsafe homegrown types

Bug Fixes

• Fix issue with older BSD kernels, mainly for current FreeBSD 10 and
  older, that don't really give RAW sockets but byte swap ip_len
  field, Olivier Cochard-Labbé (@ocochard)
• Build fixes for FreeBSD, should make maintaining ports easier :)
• Change from select() to poll() due to descriptor limits, e.g.,
  on BSD.
• UNIX 2038 first audit, inspired by OpenBSD. Cleanup type confusion
  int/u_long where it should be time_t. Also, clarify that genid
  is OK, since it's used and stored as unsigned 32-bit integer.
• Lots of minor fixes detected by Coverity Scan and Clang scan-build
  https://scan.coverity.com/projects/3320