help: describe new cross-branch behavior in update help text, plus cleanups

update: allow branch crossing without -c or -C, with no uncommitted changes Update will now allow crossing branches within the same named branch, when given a specific revision, if the working dir is clean, without requiring the -c or -C option. Abort if no revision is given and this would cross branches. Minor change to abort message if uncommitted changes are found. Modify test-update-branches and output to reflect the altered case. Modify test-merge5.out to reflect the altered case. Modify test-up-local-change.out with new message.

update: add comments and test cases for updating across branches Add comment to merge.py:update() showing various cases of 'hg update': to a descendant, crossing named branches, and crossing branches within a named branch; with no option, -c or -C; with or without uncommitted changes; and with or without a specific revision. Add tests for all of these cases.

patchbomb: fix handling of email addresses with Unicode domains (IDNA) dom.encode('idna') requires dom to be a Unicode string.

clone: add option -u/--updaterev

hgweb/sshserver: extract capabilities for easier modification

kill trailing whitespace

color: wrap qrecord The qrecord command is registered in uisetup phase, so we do our wrapping in extsetup phase.

record: use uisetup instead of extsetup to register qrecord New commands should be registered in uisetup so that other extensions have a change of wrapping them in extsetup.

merge: supply base node to merge tools in the environment Merge tools will be able to exploit this to correctly merge backouts. This won't work fully, though, until issue 1327 is solved, since the node information is not necessarily correct.

test-bisect: normalize shell error message Different shells on vary in their error messages. Here we're satisfied if the shell mentions './foobar' at all.

run-tests: add "debug" mode: don't capture child output, just show it. In debug mode, we: - don't try to diff expected vs actual output - disallow --interactive - disable timeouts (warn if user tried to supply one) - don't try to parse hghave output, since we don't have the output - don't try to save output to .err file

run-tests: make --tmpdir option more useful. - instead of creating HGTMP inside tmpdir, now HGTMP is tmpdir (thus, fail if tmpdir already exists) - passing --tmpdir automatically turns on --keep-tmpdir

hg.1: kill spurious backslash I believe the backslash prevented asciidoc from automatically turning "(C)" into a real copyright symbol. This replacement is not done in reST in the first place.

help: markup email addresses as inline literals Otherwise we get useless links to user@example.org in the HTML version of the man pages.

doc/Makefile: add help/*.txt as a dependency