update: Use https for getting the version info (fixes #5909)

youtube_dl/update.py

@@ -50,7 +50,7 @@ def rsa_verify(message, signature, key):
 def update_self(to_screen, verbose):
     """Update the program file with the latest version from the repository"""
 
-    UPDATE_URL = "http://rg3.github.io/youtube-dl/update/"
+    UPDATE_URL = "https://rg3.github.io/youtube-dl/update/"
     VERSION_URL = UPDATE_URL + 'LATEST_VERSION'
     JSON_URL = UPDATE_URL + 'versions.json'
     UPDATES_RSA_KEY = (0x9d60ee4d8f805312fdb15a62f87b95bd66177b91df176765d13514a0f1754bcd2057295c5b6f1d35daa6742c3ffc9a82d3e118861c207995a8031e151d863c9927e304576bc80692bc8e094896fcf11b66f3e29e04e3a71e9a11558558acea1840aec37fc396fb6b65dc81a1c4144e03bd1c011de62e3f1357b327d08426fe93, 65537)