On svn-auth-x509 branch, Escape embedded NUL bytes in BMP, Universal and
  UTF-8 Strings.  We already did this for T61 and IA5 with fuzzy_escape.

* subversion/libsvn_subr:
  (nul_escape): New function.
  (x509name_to_utf8_string): Run resulting UTF-8 strings through nul_escape()


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/svn-auth-x509@1613683 13f79535-47bb-0310-9956-ffa450edef68
On svn-auth-x509 branch, do some cleanup on the auth cmd implementation.

* subversion/svn/auth-cmd.c
  (show_cert): Remove dead code.
  (list_credentials): Remove dead code and trailing whitespace.


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/svn-auth-x509@1613693 13f79535-47bb-0310-9956-ffa450edef68