1. Switch 5.x version of jdk14 back to libc_r as default threading library.
We switched FreeBSD-5.x port to libkse as default threading library before
releasing of patchset 6, but users who has most of stuff linked against
libc_r and attempted to use jdk linked against libkse got into local hell
of threading libraries mix. So, rollback to libc_r by default and add
PTHREAD_LIBS support for this port.
IMPORTANT: In order to use libkse as threading library for jdk14 you
have to use rtld's libmap feature or recompile your ports stuff (like
mozilla) with libkse.
NOTE: libkse still has issues with java debug support, so if you're going
to use debuging (JVMDI) stuff - leave with libc_r for now.
2. Disable IPv6 support by default. Unfortunatelly due to security reasons
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