libkse to libpthread switch on FreeBSD

Dan writes "Daniel Eischen says that libkse has been renamed back to libpthread and is now the default threads library. The gcc-pthread option has also been changed to link to libpthread instead of libc_r. For alpha and sparc64 machines, libkse has not been renamed and links are installed so that libpthread points to libc_r. FreeBSD GNOME team's Joe Marcus Clarke confirmed that the ports system will switch to using libpthread as the default for PTHREAD_LIBS shortly. A patch set is currently being tested, once that completes, the necessary port hooks will be in place to easily build applications linked to libpthread."