Add the possibility to override default user agent for each feed

template/html/add_subscription.html

@@ -41,6 +41,9 @@
 
             <label><input type="checkbox" name="crawler" value="1" {{ if .form.Crawler }}checked{{ end }}> {{ t "Fetch original content" }}</label>
 
+	        <label for="form-user-agent">{{ t "User-Agent" }}</label>
+	        <input type="text" name="user_agent" id="form-user-agent" placeholder="{{ .defaultUserAgent }}" value="{{ .form.UserAgent }}">
+
             <label for="form-feed-username">{{ t "Feed Username" }}</label>
             <input type="text" name="feed_username" id="form-feed-username" value="{{ .form.Username }}">
 

template/html/choose_subscription.html

@@ -19,6 +19,7 @@
 <form action="{{ route "chooseSubscription" }}" method="POST">
     <input type="hidden" name="csrf" value="{{ .csrf }}">
     <input type="hidden" name="category_id" value="{{ .form.CategoryID }}">
+    <input type="hidden" name="user_agent" value="{{ .form.UserAgent }}">
     <input type="hidden" name="feed_username" value="{{ .form.Username }}">
     <input type="hidden" name="feed_password" value="{{ .form.Password }}">
     {{ if .form.Crawler }}

template/html/edit_feed.html

@@ -58,6 +58,9 @@
         -->
         <input type="text" name="feed_password" id="form-feed-password" value="{{ .form.Password }}">
 
+	    <label for="form-user-agent">{{ t "User-Agent" }}</label>
+	    <input type="text" name="user_agent" id="form-user-agent" placeholder="{{ .defaultUserAgent }}" value="{{ .form.UserAgent }}">
+
         <label for="form-scraper-rules">{{ t "Scraper Rules" }}</label>
         <input type="text" name="scraper_rules" id="form-scraper-rules" value="{{ .form.ScraperRules }}">