[[[
Adds a public API function, svn_subst_translate_string2(), an extension of
svn_subst_translate_string(), that has two, additional output parameters for
determining whether re-encoding and/or line ending translation were performed.


As discussed at:
  http://thread.gmane.org/gmane.comp.version-control.subversion.devel/122550
  http://thread.gmane.org/gmane.comp.version-control.subversion.devel/123020


* subversion/include/svn_subst.h
  (svn_subst_translate_string2): New function.
  (svn_subst_translate_string): Deprecated in favor of
    svn_subst_translate_string2().

* subversion/libsvn_subr/subst.c
  (translate_newline): Added the new parameter TRANSLATED_EOL, the value at
    which is set to TRUE if the newline string in EOL_STR is different than
    the newline string in NEWLINE_BUF.
  (translation_baton): Added the TRANSLATED_EOL field.
  (create_translation_baton): Added a new parameter TRANSLATED_EOL that is
    passed to the resulting translation_baton.
  (translate_chunk): Modified the three calls to translate_newline() to pass
    the TRANSLATED_EOL pointer from the translation baton.
  (stream_translated): New static function. Its implementation is the old
    implementation of svn_subst_stream_translated(), but accepting another
    parameter, TRANSLATED_EOL, that is passed to the in/out translation batons
    that it creates.
  (svn_subst_stream_translated): Now a wrapper for stream_translated().
  (translate_cstring): New static function. Its implementation is the old
    implementation of svn_subst_translate_cstring2(), but modified to accept
    another parameter, TRANSLATED_EOL, that is passed to stream_translated().
  (svn_subst_translate_cstring2): Now a wrapper for translate_cstring().
  (svn_subst_translate_string2): New function. The task of recording whether
    it translated a line ending is delegated to translate_cstring().
]]]