Restore coloured debug output, like we had before the logging module was adopted.

av98.py

@@ -88,8 +88,19 @@ _MIME_HANDLERS = {
 urllib.parse.uses_relative.append("gemini")
 urllib.parse.uses_netloc.append("gemini")
 
+# Set up logging (annoying necessity after splitting client into multiple
+# .py files...was it worth it?
+class AV98Formatter(logging.Formatter):
+    def format(self, record):
+        output = super().format(record)
+        if record.levelno == logging.DEBUG:
+            return "\x1b[0;32m[DEBUG] " + output + "\x1b[0m"
+            return "[DEBUG] " + output
+        else:
+            return output
 ui_out = logging.getLogger("av98_logger")
 ui_handler = logging.StreamHandler()
+ui_handler.setFormatter(AV98Formatter())
 ui_out.addHandler(ui_handler)
 
 standard_ports = {