Let Apache use separate IPv4 and IPv6 sockets for listening to any

Enable the use of two separate sockets for IPv4 and IPv6 when
LISTEN_ALL_INTERFACES is set to true. While desirable, on Linux Apache uses
IPv4-mapped IPv6 addresses by default, thus leveraging a single IPv6 socket
for IPv4 connections as well.

This behaviour is far from being desirable and can be disabled at compile
time via the "--disable-v4-mapped" flag, so make sure both an ANY address
Listen directive is present for both IPv4 and IPv6. When Apache is compiled
with "--enable-v4-mapped", the IPv4 socket will be simply ignored.

Please see https://httpd.apache.org/docs/2.4/bind.html for more
information.

Signed-off-by: Marco Chiappero <marco.chiappero@suse.com>

ironic-image/ironic-config/apache2-ipxe.conf.j2

@@ -1,4 +1,5 @@
-Listen {{ env.IPXE_TLS_PORT }}
+Listen 0.0.0.0:{{ env.IPXE_TLS_PORT }}
+Listen [::]:{{ env.IPXE_TLS_PORT }}
 
 <VirtualHost *:{{ env.IPXE_TLS_PORT }}>
     ErrorLog /dev/stderr

ironic-image/ironic-config/apache2-vmedia.conf.j2

@@ -1,4 +1,5 @@
-Listen {{ env.VMEDIA_TLS_PORT }}
+Listen 0.0.0.0:{{ env.VMEDIA_TLS_PORT }}
+Listen [::]:{{ env.VMEDIA_TLS_PORT }}
 
 <VirtualHost *:{{ env.VMEDIA_TLS_PORT }}>
     ErrorLog /dev/stderr

ironic-image/ironic-config/httpd-ironic-api.conf.j2

@@ -12,7 +12,8 @@
 
 
 {% if env.LISTEN_ALL_INTERFACES | lower == "true" %}
-Listen {{ env.IRONIC_LISTEN_PORT }}
+Listen 0.0.0.0:{{ env.IRONIC_LISTEN_PORT }}
+Listen [::]:{{ env.IRONIC_LISTEN_PORT }}
  <VirtualHost *:{{ env.IRONIC_LISTEN_PORT }}>
 {% else %}
 {% if env.ENABLE_IPV4 %}

ironic-image/ironic-config/httpd.conf.j2

@@ -1,6 +1,7 @@
 ServerRoot {{ env.HTTPD_DIR }}
 {%- if env.LISTEN_ALL_INTERFACES | lower == "true" %}
-Listen {{ env.HTTP_PORT }}
+Listen 0.0.0.0:{{ env.HTTP_PORT }}
+Listen [::]:{{ env.HTTP_PORT }}
 {% else %}
 {% if env.ENABLE_IPV4 %}
 Listen {{ env.IRONIC_IP }}:{{ env.HTTP_PORT }}