make: templatize Debian build target a la e63dfbbdbd07

make: add Ubuntu Zesty docker targets (.deb and ppa) Zesty Zapus was released on 2017-04-13 and will be supported until 2018-01.

docker: install less as a build-time dependency in deb-based distros It's needed since 387a76cac28e, otherwise dpkg-checkbuilddeps errors out.

eol: fix 'error' parameter name in the commitctx wrapper Since its introduction in 9dfee83c93c8, the parameter has always been name "error". Yet the eol extension have been using 'haserror' as the argument name, breaking extensions with subclass passing 'error' as a keyword argument.

eol: import 'error' as 'errormod' We need the 'error' name available to fix another bug, so we rename the imported module.

largefiles: avoid a crash when archiving a subrepo with largefiles disabled This path is also used for extdiff, which is how I crossed paths with it. Without this, an AttributeError occurs looking for 'lfstatus' on localrepository. See also d414c28db84d. The other archive method is for the archival.py override, so it doesn't need to be special cased like this. (It looks like it is only called for the top level repo.) Likewise, the transplant override is also for commands.py. The other overrides set lfstatus before examining it.

help: correct description of "glob:foo/*" matching Unlike what the description says, it does not match recursively. Also add an example of "glob:foo/**" (which does match recursively).

Added signature for changeset c850f0ed54c1

Added tag 4.2.1 for changeset c850f0ed54c1

status: don't crash if a lookup file disappears This can happen if another process (even another hg process!) comes along and removes the file at that time. This partly resolves issue5584, but not completely -- a bogus dirstate update can still happen. However, the full fix is too involved for stable.