(Man-specified-section-option): Test system-configuration.

(Man-specified-section-option): Test system-configuration.

(Man-mode-hook): Renamed from Man-mode-hooks.

(Man-follow-manual-reference): Strip trailing - from default.

(Man-getpage-in-background): Use lower case for arg vars.
(Man-follow-manual-reference): Check for existence of references
before using the minibuffer.  Delete period from error message.
Delete spurious concat call.  Pass arg, not (consp arg),
to Man-getpage-in-background.

(Man-follow-manual-reference): Try to use current word
as a default for the reference to follow.
Use interactive to read the reference name.