Rename the 'svnadmin verify's --check-ucs-normalization flag to just
--check-normalization, and update all internal symbols accordingly.

* subversion/include/svn_repos.h (svn_repos_verify_fs3):
   Rename 'check_ucs_norm' to 'check_normalization' and update docstring.
  (svn_repos_verify_fs3): Update docstring.
* subversion/libsvn_repos/dump.c:
   Rename 'check_ucs_norm' to 'check_normalization' everywhere.
* subversion/svnadmin/svnadmin.c: As above, and also rename the option
   keyword and command-line option name.
* subversion/tests/cmdline/svnadmin_tests.py (verify_denormalized_names):
   Update the invocation of 'svnadmin verify'.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1547002 13f79535-47bb-0310-9956-ffa450edef68