ra_serf: Stringify SVN_AUTH_SSL_OTHER as well
ra_serf: Stringify SVN_AUTH_SSL_OTHER as well

* subversion/libsvn_ra_serf/util.c
  (ssl_server_cert): Handle SVN_AUTH_SSL_OTHER.

git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1515225 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion