Fix a path encoding bug.  When running:
Fix a path encoding bug.  When running:

  svn mkdir "http://.../some dir" "http://.../some dir/child"

the code was URI-encoding "some dir" in a place where an unencoded
relpath was expected.

authz_tests.py 4 revealed this problem (and now passes again as a
result of the fix).

* subversion/libsvn_client/add.c
  (mkdir_urls): Don't URI the re-split URLs basename.

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