Issue 2301 - Fix bogus escaping in previous commit

modules/web/templates/adblockplus.org.conf.erb

 # XSS and clickjacking prevention headers
 
 set $csp_frame "";
 if ($uri ~ ^/(:?\w\w(_\w\w)?/)?(?:index|firefox|chrome|opera|android|internet-explorer|safari|yandex-browser|maxthon)?$)
 {
   set $csp_frame "; frame-src www.youtube-nocookie.com;";
 }
-add_header Content-Security-Policy "default-src \'self\'; img-src * data:; style-src \'self\' \'unsafe-inline\'; script-src \'self\' \'unsafe-inline\' \'unsafe-eval\' $csp_frame";
+add_header Content-Security-Policy "default-src 'self'; img-src * data:; style-src 'self' 'unsafe-inline'; script-src 'self' 'unsafe-inline' 'unsafe-eval' $csp_frame";
 add_header X-Frame-Options "sameorigin";
 
 # User agent sniffing
 
 set $user_agent "";
 if ($http_user_agent ~ \bGecko/\d+)
 {
   set $user_agent "firefox";
 }
 if ($http_user_agent ~ \bSafari/\d+)
@@ skipping 30 matching lines @@
 }
 if ($http_user_agent ~ \bYaBrowser/\d+)
 {
   set $user_agent "yandex-browser";
 }
 if ($http_user_agent ~ \bMaxthon/\d+)
 {
   set $user_agent "maxthon";
 }
 
-sub_filter \' id="content" class="\' \' id="content" class="ua-$user_agent \';
+sub_filter ' id="content" class="' ' id="content" class="ua-$user_agent ';
 
 set $index_page "firefox";
 if ($user_agent != "")
 {
   set $index_page $user_agent;
 }
 
 # Various redirects
 
 rewrite ^/(\w\w(_\w\w)?/)?changelog-1.3.1$ /$1\changelog-1.3 permanent;
@@ skipping 141 matching lines @@
 location /403.html
 {
   try_files $uri @proxied;
 }
 location @proxied
 {
   proxy_pass https://server_16.adblockplus.org;
   proxy_set_header Host adblockplus.org;
   proxy_redirect https://adblockplus.org/ https://$host/;
 }