qutebrowser: Add startpage to search engines

While DDG uses bing in the back end, startpage uses google without
resorting to tracking. Use startpage so we never have to use google.

qutebrowser/.config/qutebrowser/config.py

@@ -138,6 +138,7 @@ c.url.searchengines = {
     "aw": "https://wiki.archlinux.org/index.php?search={}",
     "c": "https://crates.io/search?q={}",
     "d": "https://docs.rs/releases/search?query={}",
+    "g": "https://startpage.com/do/asearch?q={}",
     "gh": "https://github.com/search?q={}",
     "hg": "https://www.haskell.org/hoogle/?hoogle={}",
     "mal": "https://myanimelist.net/search/all?q={}",