Solaris support - missing or incompatible functions

[Vladimir Marek]

> > I can't run the notmuch 'make test' on Solaris (too old bash) and on linux the
> > results are
> >
> > 421/525 tests passed.
> > 25 tests failed.
> > 79 tests skipped.
> >
> > but they are the same without my changes too ...
> 
> The series LGTM, except I didn't pay much attention to the timegm()
> implementation. I hope the time parsing tests pass though. If they do,
> and you think the implementation is good enough, then who am I to
> argue. ;)


I didn't pay too much attention to the test output as it's broken on
linux too :)

Thank you
-- 
	Vlad