(legacy) fix some crash reports, related to " PHP Fatal error:  Call to undefined function lookup_gateway_ip_by_name() in /usr/local/etc/inc/system.inc on line 151"

fix interfaces.inc dependency for lookup_gateway_ip_by_name in system_resolvconf_generate

name/version was chopped after the first dash, which caused e.g.
openssh-portable-6.9 to be advertised as `openssh' with version
`portable'.  Split on last dash instead using shell magic.

(legacy) from crash reports, Warning: Illegal string offset 'vip' in /usr/local/etc/inc/xmlrpc/legacy.inc on line 304

Taken from: https://6session.wordpress.com/2009/04/08/ipv6-martian-and-bogon-filters/

o Only probe for key press on bootup.

o Rebuild autodetect feature: fixup second use case of
  get_interface_list() to filter out devices without a
  good link state, bring back interface up for it to
  work and mute kernel messages that would clobber stty
  behaviour.

While there, clean up messages for clarity and grammatical correctness.

Had to merge and squash and edit punctuation:

" :" to ":", " ?" to "?" to retain original document style