- most were trivial
- missing group close or open
- extra space
- no doxygen comment
- name commad might open an implicit group
this hould also be implicit cosed but does not happen somtimes
- crazy: internal declared groups have to be closed internal
If DEVELHELP is not set `LOCK_TCPIP_CORE()`/`UNLOCK_TCPIP_CORE()`
are not defined, leading to a build failure.
Defining them to no-op leads to a run-time segmentation fault, so
better always use those functions.
