* subversion/libsvn_ra_serf/util.c: Add and improve some function    documentation, cleanup a comment.
* subversion/libsvn_ra_serf/util.c: Add and improve some function 
  documentation, cleanup a comment.

Suggested by: kfogel

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion