Added --time_range option

this causes pflogsumm to consider only log lines written in the
specified period.
Revert "removed string trimming"

	use the built-in --verbose_msg_detail switch

This reverts commit bc24fa9e3932ef548e9b3d098a66d6c08afb8599.
merge with upstream pflogsumm-1.1.5
MailScanner requeue detection (enable attribution of sender stats)
Merge --time-range (by @michielbuddingh) w/1.1.5 compliance

	Merge branch 'master' of https://github.com/michielbuddingh/pflogsumm into github
	adjust underscore/dash switch
Merge pull request #4 from nasieti/master

feature evolution