[PATCH] Fix issue #2116

Hi,

attached is a series of patches that I believe fix issue #2116
('svn log file:///' results in a failed assertion).

Does anyone object to any of these?

Stefan

[[[

Canonicalise URIs which have an empty hostname part correctly.
This fixes the crash described in #2116 ('svn log file:///'
results in a failed assertion).

* subversion/libsvn_subr/path.c
  (svn_path_canonicalize): We used to strip the trailing slash
   of URIs with no hostname, e.g. http:// got canonicalised to http:/
   Don't do that!

* subversion/tests/libsvn_subr/path-test.c
  (test_canonicalize): Add some test cases for the above.

]]]

[[[

* subversion/libsvn_ra_local/split_url.c
  (svn_ra_local__split_URL): Treat file:// equivalent to file:///.
   This function used to complain about a missing hostname when
   just passed "file://". But "file://" is the canonical version
   of "file:///", which is equivalent to "file://localhost/".
   skip_uri_scheme() (in subversion/libsvn_subr/path.c) and
   therefore svn_path_is_url() have been considering "file://"
   a valid URL since r14445.

]]]

[[[

* subversion/libsvn_ra_neon/session.c
  (parse_url): Don't accept an empty hostname.

]]]

[[[

* subversion/libsvn_ra_serf/serf.c
  (svn_ra_serf__open,
   svn_ra_serf__reparent): Don't accept an empty hostname.

]]]

[[[

* subversion/libsvn_ra_svn/client.c
  (parse_url): Don't accept an empty hostname.

]]]