Azure-lb fails if IPv6 disabled (#1939)
Add a new parameter: listen
This parameter can have following walues:
default: Neither -4 nor -6 will be used. The default behavior of socat and nc will be used.
socat: Listen only on IPv4 addresses nc: If net.ipv6.bindv6only = 0 => Listen on both IPv4 and IP6 addresses If net.ipv6.bindv6only = 1 => Listen only on IPv4 addresses
ipv4only: Listen only on IPv4 addresses.
ipv6enable: Enable TCP6 support.
nc: Listen only on IPv6 adresses independent of net.ipv6.bindv6only socat: If net.ipv6.bindv6only = 0 => Listen on both IPv4 and IP6 addresses. If net.ipv6.bindv6only = 1 => Listen only on IPv6 adresses.
Co-authored-by: Peter Varkoly <varkoly@suse.com>