2905 regex redirects with domain

Hi Jürgen,

as requested in ansible-inventories/arocom#2905 here's the merge request.

It introduces a new variable used for regex redirects valled use-domain which results in the redirect target on regex redirects containing protocol and version.

The variable is of course optional since we don't want to potentially break existing redirects.

Eric

templates/haproxy_cfg.jinja2

@@ -90,9 +90,13 @@ frontend http_in
   http-request deny if !letsencrypt_challenge { {{ (from == ".") | ternary('hdr_sub', 'hdr') }}(host) -i -n {{ from }}{% if path.from is defined %} } { {{path.exact|default(false)|ternary('path /','path_reg ^/')}}{{path.from}}{% endif %} }
 {% else %}
 {% if path.regex is defined and path.from is defined %}
+{% if path.use-domain is defined and path.use-domain %}
+  http-request redirect code 301 location {{ redirect.protocol|default('https') }}://{{redirect.to|default(from)}}{{ path.to|default('') }}%[capture.req.uri,regsub({{path.regex}},)] if !letsencrypt_challenge { {{ (from == ".") | ternary('hdr_sub', 'hdr') }}(host) -i -n {{ from }} } { {{path.exact|default(false)|ternary('path /','path_reg ^/')}}{{path.from}} }
+{% else %}
   http-request redirect code 301 location {{ path.to|default('') }}%[capture.req.uri,regsub({{path.regex}},)] if !letsencrypt_challenge { {{ (from == ".") | ternary('hdr_sub', 'hdr') }}(host) -i -n {{ from }} } { {{path.exact|default(false)|ternary('path /','path_reg ^/')}}{{path.from}} }
 {% endif %}
 {% endif %}
+{% endif %}
 {% endfor %}
 {% endfor %}
 {% endfor %}
@@ -235,9 +239,13 @@ frontend https_in_{{ cert.ip }}
   http-request deny if { {{ (from == ".") | ternary('hdr_sub', 'hdr') }}(host) -i -n {{ from }}{% if path.from is defined %} } { {{path.exact|default(false)|ternary('path /','path_reg ^/')}}{{path.from}}{% endif %} }
 {% else %}
 {% if path.regex is defined and path.from is defined %}
+{% if path.use-domain is defined and path.use-domain %}
+  http-request redirect code 301 location {{ redirect.protocol|default('https') }}://{{redirect.to|default(from)}}{{ path.to|default('') }}%[capture.req.uri,regsub({{path.regex}},)] if { {{ (from == ".") | ternary('hdr_sub', 'hdr') }}(host) -i -n {{ from }} } { {{path.exact|default(false)|ternary('path /','path_reg ^/')}}{{path.from}} }
+{% else %}
   http-request redirect code 301 location {{ path.to|default('') }}%[capture.req.uri,regsub({{path.regex}},)] if { {{ (from == ".") | ternary('hdr_sub', 'hdr') }}(host) -i -n {{ from }} } { {{path.exact|default(false)|ternary('path /','path_reg ^/')}}{{path.from}} }
 {% endif %}
 {% endif %}
+{% endif %}
 {% endfor %}
 {% endfor %}
 {% endfor %}