Documentation: A couple of trivial fixes in sip.conf.sample and func_cdr.c

Documentation: A couple of trivial fixes in sip.conf.sample and func_cdr.c

 * In sip.conf.sample fix sentence where we said that WS or WSS are supported
   transports for use in an outbound register definition. They are not
   supported in that case.
 * In func_cdr.c made it clear that the Disable option for CDR_PROP can be used
   to enable CDR on a channel.

ASTERISK-24867 #close
Reported by: Rusty Newton

ASTERISK-24853 #close
Reported by: PSDK

Change-Id: I3d698bc6302b9d00a0a995b5c4ad9a42d69b48ca