hgweb: support for deny_read/allow_read options
reimplementation of a patch provided by Nilton Volpato.
Folded into a single patch by Thomas Arendsen Hein.
#!/bin/shhghg -qhg helphg -q helphg add -hhg add --skjdfkshg help diffhg help statushg -q help statushg help foohg skjdfksexit 0