This patch adds functionality to update the visibility exceptions set with the
hidden commits whose hashes are passed if the command allow accessing them and
showing warning depending on repo.filtername which is set by the type of
The logic to check whether a symbol is hash and logic related to showing
warning to user is imported from directacess extension from fb-hgext.
Nit: this should be a tuple, not a list. Tuples are immutable and I believe Python will compile it once instead of allocating a new list object every invocation.