[imgclick] use 'http://' for image URLs

The TLS certificate for main.imgclick.net is invalid.

docs/supportedsites.md

@@ -285,7 +285,7 @@ Consider all sites to be NSFW unless otherwise known.
 </tr>
 <tr>
     <td>Imgclick</td>
-    <td>https://imgclick.net/</td>
+    <td>http://imgclick.net/</td>
     <td>individual Images</td>
     <td></td>
 </tr>

gallery_dl/extractor/imagehosts.py

@@ -257,10 +257,11 @@ class ImgclickImageExtractor(ImagehostImageExtractor):
     category = "imgclick"
     pattern = r"(?:https?://)?((?:www\.)?imgclick\.net/([^/?#]+))"
     test = ("http://imgclick.net/4tbrre1oxew9/test-_-_.png.html", {
-        "url": "b967f2d372ffb9f5d3a927c6dd560e120b10a808",
+        "url": "140dcb250a325f2d26b2d918c18b8ac6a2a0f6ab",
         "keyword": "6895256143eab955622fc149aa367777a8815ba3",
         "content": "0c8768055e4e20e7c7259608b67799171b691140",
     })
+    https = False
     params = "complex"
 
     def get_info(self, page):