(generic-define-unix-modes): Added new modes:

(generic-define-unix-modes): Added new modes:
inetd-conf-generic-mode, etc-services-generic-mode,
etc-passwd-generic-mode.  These are all defined for Unix by default.
(apache-generic-mode): Use an imenu-generic-expression to list
Configuration keywords.
(samba-generic-mode): Use both ; and # as comment characters.
(samba-generic-mode): Font-lock expressions now highlight name value pairs.
(bat-generic-mode): Keywords are now case-insensitive through
font-lock-defaults setting.
(java-properties-generic-mode): Supports both ! and # as comment characters.
(java-properties-generic-mode): Added an imenu-generic-expression
(java-properties-generic-mode): Reworked to support the various
different ways to separate name and value (viz, '=', ':' and whitespace).
(show-tabs-generic-mode): Added this new generic-mode.