merge with stable

largefiles: don't crash when trying to find default dest for url without path b32e55e6c3c7 introduced a crash when cloning a url without path - where util.url().path would be None. This None will now be handled as ''. clone will thus abort with 'repository / not found' as before.

hgweb.cgi: fix internal WSGI emulation (issue3804) The internal WSGI emulation in wsgicgi.py was not fully WSGI compliant and assumed that all responses sent a body. With 3fbdbeab38cc that caused a real bug when using hgweb.cgi. wsgicgi.py will now make sure headers always are sent, using the pattern from PEP 333 and similar to how it is done in c007e5c54b16.

bdiff: simplify overflow checks Rather than check that each delta start, end, and length is within 32 bits, we simply check that the input strings are under 4GB.

Merge crew-stable into crew

rebase: derive node from target rev (issue3802) dest.rev() is the same as target when a new rebase is run, but dest isn't set when rebase --continue is run. Bug introduced in 2a1fac3650a5, which fixed issue3685.

profiling: introduce limit configuration option The number of output lines was hardcoded to 30. There was a 'nested' configuration options that controlled something else related to counting the number of output lines. This introduces the profiling.limit configuration option for controlling the number of profiling output to show.

largefiles: make verify --lfa and --lfc work without --large The slightly obscure --lfa and --lfc only worked as modifiers to --large and could be combined. The documentation was however not clear what they did. Instead they now imply --large and the description is updated.

largefiles: verify status should be written as status, not as write Make 'hg verify --large -q' quiet when no errors.

largefiles: report localstore errors with single line warnings messages The actual hash is also not relevant to report. This makes verify output with multiple failures easier to process.

merge: inline act() The act function had become very trivial and mainly shuffled arguments around and made it harder to see what really was going on.

merge: don't indent "local changed %s which remote deleted" prompt It was usually not shown in a context where indentation helped readability and it was inconsistent with other prompts.