Reverting in favor of upstream patch.

Revert "miniupnpd: Don't call IPv6-related function if IPV6 isn't enabled (fixes crashes when requesting a PCP MAP)"

This reverts commit d9b8115d326a9915dbd4609c4957b8e94c94cac4.
miniupnpd: Patch from upstream (miniupnpd/getifaddr.c: fix getifaddr_in6() - commit d397d736282affae9862fd114f243518e7680f14)
miniupnpd: getifaddr_in6() only return IPv4 address when IPV6 disabled (patch from upstream 81fa1bcd57e6f00b3b1d0aa6d240abb3e35a30a7)
miniupnpd: Additional patches from upstream related to getifaddr()
miniupnpd: Configure default lifetime values