directaccess: don't try to partialmatch things that aren't hashes Trying to partialmatch identifiers like '.' turns out to be (a) pointless and (b) extremely slow. On a repo with a million commits, with directaccess enabled, hg log -r .^::. goes from 2.1 seconds to 0.5.

test-drop.t
test-simple4server.t
tests/test-simple4server-bundle2.t