When creating firewallrules or using firewall groups,
it should be possible to select a single IpSec subnet if there is more than one.
This patch adds a new languagefileword "fwdfw all subnets" which is used in firewall.cgi and fwhosts.cgi Signed-off-by: Alexander Marx <alexander.marx@ipfire.org> Tested-by: Peter Müller <peter.mueller@link38.eu> Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>