Make "[web] allow_push, deny_push" and "[http_proxy] no" use ui.configlist.

Fixed [web] allow_archive for comma separated parameters by using ui.configlist. Changed tests/test-archive to use allow_archive instead of the deprecated allowzip, allowgz and allowbz2.

Added ui.configlist method to get comma/space separated lists of strings. For example: users = alice, bob colors = red green blue

Fix ui.expandpath problem and broken test introduced by 4a2a4d988ead.

do not try to package lsprof if not available.

add test for default-push.

make ui.expandpath better with default path.

push, outgoing, bundle: fall back to "default" if "default-push" not defined

print message after backout that tells that backout adds new head.

Test case for #295