Split --raw-logs into --no-pretty and --no-log options.

--no-log: don't capture logs or run redo-log (same as pre-redo-log redo)
  --no-pretty: don't pretty-print logs, print @@REDO lines.

The latter is an option to both redo and redo-log.

logs.py

@@ -100,7 +100,7 @@ _log = None
 
 def setup(file, pretty):
     global _log
-    if pretty:
+    if pretty or vars.PRETTY:
         check_tty(file)
         _log = PrettyLog(file=file)
     else: