Improve beta.adblockplus.org configuration

[trev]

Background

beta.adblockplus.org has been set up as a minimal web server right now. However, our current website has lots of additional functionality.

What to change

Add custom nginx configuration for UA detection, CSP headers, devbuilds redirects etc. Set up multiplexer locations currently available via adblockplus.org. Proxy access to URLs like /blog or /forum.

[trev]

The new configuration is significantly different from the old one, that's unavoidable given the completely different setups. So I decided to remove a bunch of ancient redirects:

      rewrite ^/en/nsIAdblock(.*) /en/IAdblock$1 permanent;
      rewrite ^/(\w\w(_\w\w)?)/installation$ /$1/ permanent;
      rewrite ^/anwiki/(.*) /$1 permanent;

      if ($query_string ~ "tip=disable") {
        rewrite ^/(\w\w)/tips$ /$1/faq_basics#disable? permanent;
      }
      if ($query_string ~ "tip=effective_filter") {
        rewrite ^/(\w\w)/tips$ /$1/getting_started#false-positives? permanent;
      }
      if ($query_string ~ "tip=subscriptions_remove_filter") {
        rewrite ^/(\w\w)/tips$ /$1/getting_started#false-positives? permanent;
      }
      rewrite ^/(\w\w)/tips$ /$1/getting_started? permanent;

      if ($arg_category = "mozilla/gecko/security")
      {
        rewrite ^/(atom|rss)/$ /$1/?category=mozilla,gecko,security? permanent;
      }
      if ($arg_category = "mozilla%2Fgecko%2Fsecurity")
      {
        rewrite ^/(atom|rss)/$ /$1/?category=mozilla,gecko,security? permanent;
      }

      location /awstats/ {
        rewrite ^ https://stats.adblockplus.org/web/adblockplus.org/;
      }

These refer to URLs that existed at least three years ago.

[trev]

There were also some redirector entries referring to pages that have been removed:

        if ($arg_link ~ "^knownIssues_(\w+)")
        {
          set $link "known-issues";
          set $anchor "#$1";
        }
        if ($arg_link ~ "^knownIssuesChrome_(\w+)")
        {
          set $link "known-issues-chrome";
          set $anchor "#$1";
        }

These are not part of the new config either.

[trev]

Pushed ​https://hg.adblockplus.org/infrastructure/rev/49377f583088 but realized that this commit had issues. Follow-up patch under review, the changes have already been deployed to the server.

[trev]

Pushed ​https://hg.adblockplus.org/infrastructure/rev/fad1f8ee61fa, one more change under review.

[trev]

Fixed links in forum and blog as well: ​https://hg.adblockplus.org/infrastructure/rev/cee777eae620