std.duration conversion function has a mandatory qualifier. Change the
wording from 'can' to 'must' specify the qualifier.

Add a test case for a string without a qualifier.

This kills `remove', `.request' and `.response'.  Use `unset', `.method'
and `.reason' instead.
ok phk.

There seems to be a tendency for systems to trip up the previous
10 second cli_timeout during nightly housekeeping operations, possibly
log rotation running out of cron.

Spotted by:	gquintard

They break the build if parallelised and make jenkins upset

Fixes	#1432

Varnishtest not run by:		fgs

Add a second parameter to $Module to specify the manpage section
and change how the description is printed.

Spelling. While here also fix indentation and make sure we are using
the right name for the variables and not the backward compat ones.