chore: Log process ID during initialization for debugging purposes

Signed-off-by: Sven Sager <akira@narux.de>

src/revpipyload/proginit.py

@@ -9,6 +9,7 @@ import os
 import sys
 from argparse import ArgumentParser
 from configparser import ConfigParser
+from os import getpid
 
 from . import __version__
 
@@ -186,3 +187,6 @@ def configure():
     else:
         loglevel = logging.DEBUG
     logger.setLevel(loglevel)
+
+    # Log PID for development purposes
+    logger.debug("Running with PID {}".format(getpid()))