Reverting r1589262 as we can't have a normalized repository path on
all platforms.

Because source and target of a hotcopy share the same UUID, they also
share the same mutexes.  Attempting to acquire the same locks on them
will result in deadlocks on some systems.  Therefore, we can only take
out the write lock on the dest repo (which is 1.8 and earlier behavior).

* subversion/libsvn_fs_fs/fs.c
  (fs_serialized_init): Remove path component from hash key.

* subversion/libsvn_fs_fs/hotcopy.c
  (svn_fs_fs__hotcopy): Acquire only the write lock on DST_FS, which
                        allows us to also get the pack lock on SRC_FS
                        without deadlocks.

git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1589518 13f79535-47bb-0310-9956-ffa450edef68