Move static docs to the new AstXML form.

Move SMDI_MSG and SMDI_MSG_RETRIEVE functions statis documentation
to XML.

(issue #15245)
Reported by: eliel
Patches:
      res_smdi_static_conversion.txt uploaded by lmadsen (license 10)



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@199091 65c4cc65-6c06-0410-ace0-fbb531ad65f3