- 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
* jf: if bit 14 in reg 0x5d (electron mode collection bit) is changed, configure chip if v1.1 and powered on. so touch writeregister (setbit/clearbit also calls write register in the end). replace when electroncollectionmode command introduced
