Try to detect systems with no IPv6 support.
Try to detect systems with no IPv6 support.

AlexeySa/rspamd,awhitesong/rspamd,dark-al/rspamd,dark-al/rspamd,minaevmike/rspamd,amohanta/rspamd,amohanta/rspamd,minaevmike/rspamd,andrejzverev/rspamd,dark-al/rspamd,minaevmike/rspamd,awhitesong/rspamd,andrejzverev/rspamd,dark-al/rspamd,AlexeySa/rspamd,dark-al/rspamd,AlexeySa/rspamd,minaevmike/rspamd,amohanta/rspamd,AlexeySa/rspamd,andrejzverev/rspamd,andrejzverev/rspamd,AlexeySa/rspamd,amohanta/rspamd,minaevmike/rspamd,andrejzverev/rspamd,awhitesong/rspamd,andrejzverev/rspamd,AlexeySa/rspamd,AlexeySa/rspamd,AlexeySa/rspamd,minaevmike/rspamd,andrejzverev/rspamd,awhitesong/rspamd,minaevmike/rspamd,minaevmike/rspamd,andrejzverev/rspamd,AlexeySa/rspamd,amohanta/rspamd,minaevmike/rspamd