Make "sip show settings" CLI command get RPID flags from the right global page

The "Trust RPID" and "Send RPID" entries in the "sip show settings" CLI command
pulled the flags from the incorrect global flags page.  These are now read from
sip global flags page 0.

(closes issue AST-711)
........

Merged revisions 343743 from http://svn.asterisk.org/svn/asterisk/branches/10


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@343744 65c4cc65-6c06-0410-ace0-fbb531ad65f3