Dev/reg bit change no validate (#970)

- do not validate write reg, setbit and clearbit by default anymore
- --validate will force validation on the bitmask or entire reg
- remove return value for write reg (across server to client, but thankfully not in the Detector class)
- extend validation into writereg, setbit and clearbit for Eiger (always special)
-  need to check python (TODO)
- missed the rx_zmqip implementations in detector.h and python bindings

slsDetectorSoftware/generator/autocomplete/autocomplete.py

@@ -21,8 +21,8 @@ type_values = {
     "special::currentSourceFix": ["fix", "nofix"],
     "special::currentSourceLow": ["normal", "low"],
     "special::path": [],
-    "special::pedestal_parameters" : ["", "0"]
-
+    "special::pedestal_parameters" : ["", "0"],
+    "special::validate": ["--validate"]
 }