improve data on author_handle.json files

Updated URLs, Email addresses, GitHub handles,
Mastodon handles, and locations of various IOCCC winning authors.

author/Dave_Burton.json

@@ -7,8 +7,8 @@
     "location_code" : "US",
     "location_name" : "United States of America",
     "email" : "daveb@snox.net",
-    "url" : "http://snox.net/ioccc",
-    "alt_url" : null,
+    "url" : "http://ioccc.snox.net",
+    "alt_url" : "https://snox.net/ioccc/",
     "deprecated_twitter_handle" : "@lv2jmp",
     "mastodon" : null,
     "mastodon_url" : null,