esp8266/scripts/webrepl: Add optional password argument to webrepl.start()

This commit fixes issue #2045

esp8266/scripts/webrepl.py

@@ -49,8 +49,9 @@ def stop():
         listen_s.close()
 
 
-def start(port=8266):
+def start(port=8266, password=None):
     stop()
+    if password is None:
         try:
             import port_config
             _webrepl.password(port_config.WEBREPL_PASS)
@@ -60,3 +61,7 @@ def start(port=8266):
             import webrepl_setup
             setup_conn(port, webrepl_setup.handle_conn)
             print("Started webrepl in setup mode")
+    else:
+        _webrepl.password(password)
+        setup_conn(port, accept_conn)
+        print("Started webrepl in normal mode")