ClearCase: symbolic links cause errors during indexing

From https://support.atlassian.com/browse/FSH-3606

When FishEye attempts to process ClearCase symlinks, a 'Invalid Version Id' error appears in the logs.

Another support request with a similar problem: https://support.atlassian.com/browse/FSH-4803

When a symbolic link is deleted, FishEye assumes the output of the diff for the directory containing the symlink is a path, but cleartool uses a different syntax for symbolic links:

doctn -> ..\vob1\doctn 13-Aug.	08:44 akp

instead of

obj2 12-Aug.14:00 akp

for regular files