(legacy) fix crashreport " PHP Warning:  Illegal string offset 'vip' in /usr/local/www/carp_status.php on line 124"

(legacy) fix crashreport " PHP Warning:  Illegal string offset 'ifgroupentry' in /usr/local/www/firewall_rules_edit.php on line 869"

(legacy) fix crashreport  PHP Warning:  substr_count(): Empty substring in /usr/local/www/services_ntpd.php on line 290

(legacy) fix crashreport  PHP Warning:  htmlspecialchars() expects parameter 1 to be string, array given in /usr/local/www/services_dhcp_relay.php on line 185

(legacy) fix crashreport " PHP Warning:  Illegal string offset 'item' in /usr/local/www/services_dnsmasq_edit.php on line 250"

(legacy) fix crashreport "PHP Warning:  Illegal string offset 'if' in /usr/local/etc/inc/filter.inc on line 394"

(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.