Try to get errno before it changes.
Try to get errno before it changes.

* subversion/libsvn_ra_svn/cyrus_auth.c
  (get_sasl_errno_msg): Document usage.
  (get_sasl_error): Document usage, query errno earlier.
  (new_sasl_ctx): Query errno earlier.

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