[syslog-ng]2 questions: confusion + compile problem

Hello, Let me try this again. :) Is the stable release 1.6 or 1.9? I see a 1.9.1 and 1.6.0rc1. The older one seems to be a release candidate and the newer one seems to be full release. Am I missing something? Also, is olib needed for 1.9.1? The configure script didn't complain when it couldn't find it, but I did get a make error that getopt.h couldn't be found. I tried building against glib 2.2.1, which built and installed successfully. Thanks for any clues... Brian