proxies/debuginfod: allow proxyopts

debuginfod can take O(60s) to run certain webapi queries, so the httpd
mod_proxy default timeouts are too short.  Introduce an ansible
variable "proxyopts", expanded into the httpd ProxyPass and
ProxyPassReverse configuration lines.  Default to "", but set it
with pretty generous limits for debuginfod only.

playbooks/include/proxies-reverseproxy.yml

@@ -754,5 +754,6 @@
     remotepath: /
     localpath: /
     proxyurl: http://debuginfod01:8002
+    proxyopts: "connectiontimeout=600 timeout=600 keepalive=on"
     tags: debuginfod
 

roles/httpd/reverseproxy/tasks/main.yml

@@ -5,6 +5,7 @@
 # - proxyurl
 # - rewrite
 # - keephost
+# - proxyopts
 
 - name: Set OpenShift information if not preconfigured
   set_fact:

roles/httpd/reverseproxy/templates/reversepassproxy.conf

@@ -64,6 +64,6 @@ RewriteRule .* "balancer://{{ balancer_name }}-websocket%{REQUEST_URI}" [P]
 ProxyPass {{ localpath }} "balancer://{{balancer_name}}{{remotepath}}"
 ProxyPassReverse {{ localpath }} "balancer://{{balancer_name}}{{remotepath}}"
 {% else %}
-ProxyPass {{ localpath }} {{ proxyurl }}{{remotepath}}
-ProxyPassReverse {{ localpath }} {{ proxyurl }}{{remotepath}}
+ProxyPass {{ localpath }} {{ proxyurl }}{{remotepath}} {{ proxyopts }}
+ProxyPassReverse {{ localpath }} {{ proxyurl }}{{remotepath}} {{ proxyopts }}
 {% endif %}

roles/httpd/reverseproxy/vars/main.yml

@@ -7,3 +7,4 @@ header_scheme: false
 keephost: false
 targettype: plain
 http_not_https_yes_this_is_insecure_and_i_feel_bad: false
+proxyopts: ""