Support to omit the destination domain in redirects and default to the request domain

Implement support for extra conditions in redirects

templates/haproxy_cfg.jinja2

@@ -104,12 +104,12 @@ frontend http_in
 {% for path in redirect.paths|default([]) %}
 {% if not path.deny|default(false) %}
 {% if path.regex is not defined or path.from is not defined %}
-  http-request redirect code 301 location {{ redirect.protocol|default('https') }}://{{redirect.to}}/{{path.to|default('')}}{% if path.append_path|default(false) %}%[capture.req.uri]{% endif %}{% if path.append_query is defined %}?{{ path.append_query }}{% endif %} 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 %} }
+  http-request redirect code 301 location {{ redirect.protocol|default('https') }}://{{redirect.to|default(from)}}/{{path.to|default('')}}{% if path.append_path|default(false) %}%[capture.req.uri]{% endif %}{% if path.append_query is defined %}?{{ path.append_query }}{% endif %} 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 %}{% if path.condition is defined %} {{path.condition}}{% endif %} }
 {% endif %}
 {% endif %}
 {% endfor %}
-{% if (from != redirect.to or redirect.protocol|default('https') == 'https') and redirect.paths is not defined %}
-  redirect prefix {{ redirect.protocol|default('https') }}://{{redirect.to}} code 301 if !letsencrypt_challenge { hdr(host) -i -n {{ from }} }
+{% if (from != redirect.to|default(from) or redirect.protocol|default('https') == 'https') and redirect.paths is not defined %}
+  redirect prefix {{ redirect.protocol|default('https') }}://{{redirect.to|default(from)}} code 301 if !letsencrypt_challenge { hdr(host) -i -n {{ from }} }
 {% endif %}
 {% endfor %}
 {% endfor %}
@@ -233,12 +233,12 @@ frontend https_in_{{ cert.ip }}
 {% for path in redirect.paths|default([]) %}
 {% if not path.deny|default(false) %}
 {% if path.regex is not defined or path.from is not defined %}
-  http-request redirect code 301 location {{ redirect.protocol|default('https') }}://{{redirect.to}}/{{path.to|default('')}}{% if path.append_path|default(false) %}%[capture.req.uri]{% endif %}{% if path.append_query is defined %}?{{ path.append_query }}{% endif %} 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 %} }
+  http-request redirect code 301 location {{ redirect.protocol|default('https') }}://{{redirect.to|default(from)}}/{{path.to|default('')}}{% if path.append_path|default(false) %}%[capture.req.uri]{% endif %}{% if path.append_query is defined %}?{{ path.append_query }}{% endif %} 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 %}{% if path.condition is defined %} {{path.condition}}{% endif %} }
 {% endif %}
 {% endif %}
 {% endfor %}
-{% if (from != redirect.to or redirect.protocol|default('https') != 'https') and redirect.paths is not defined %}
-  redirect prefix {{ redirect.protocol|default('https') }}://{{redirect.to}} code 301 if { hdr(host) -i -n {{ from }} }
+{% if (from != redirect.to|default(from) or redirect.protocol|default('https') != 'https') and redirect.paths is not defined %}
+  redirect prefix {{ redirect.protocol|default('https') }}://{{redirect.to|default(from)}} code 301 if { hdr(host) -i -n {{ from }} }
 {% endif %}
 {% endfor %}
 {% endfor %}