simplify flags/page2_flags stuff by using arrays instead

enhance handle_common_options to be able to set flags in the second set of flags (what used to be page2_flags)
various other minor fixes


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@15187 65c4cc65-6c06-0410-ace0-fbb531ad65f3