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

python/slsdet/registers.py

@@ -8,7 +8,7 @@ class Register:
         return self._detector.readRegister(key)
 
     def __setitem__(self, key, value):
-        self._detector.writeRegister(key, value)
+        self._detector.writeRegister(key, value, False)
 
 class Adc_register:
     def __init__(self, detector):