commands: fix help string for pull -u and unbundle -u.
They update to new branch head, not new tip -- same as 'hg update'.
httprepo: always store the response url (
issue1968)
Fixes a regression caused by
54b518fc6671
test-convert-svn-branches: filter unwanted output
Windows cmd.exe emits a different message than sh:
"""
foobar is not recognized as an internal or external command,
operable program or batch file.
"""
Filter it.