Refactor to clarify API and local variable names.  No functional change.
Refactor to clarify API and local variable names.  No functional
change.

* contrib/client-side/svnmerge.py
  (target_to_repos_relative_path): Rename from target_to_rlpath(), and
   improve doc string by saying "repository-relative path" instead of
   "repo-local path".

  (RevisionLog.__init__, get_copyfrom, main): Rename local variable
   "rlpath" to "repos_path", and update for rename of
   target_to_rlpath() to target_to_repos_relative_path().

  (get_default_head, analyze_head_revs): Update for rename of
   target_to_rlpath() to target_to_repos_relative_path().

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