Update man-page with new -z, --fake-address option.

This is also a cleanup of the man page, updating sections to present
inadyn better.  Amongst other things, the authors section now mentions
the immense work put in by Andrey Tikhomirov and Mike Fleetwood.  Thanks
guys!

Also fix the whitespace corrupting syntax error in the --startup-delay
reference to SIGNALS section.  Was .Sm, should've been .Sx ...

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>