* Removed -HUP so the default -TERM signal is sent instead.
- hyperiond only listens for TERM and INT. HUP is often used to get an exe to reread its config
Changed pgrep to add '-x' so it wont partial match on the exe name.
- I have multiple instances with multiple hyperiond-instance1 names
- this ensures the service script only kills the right process
* reversing errant change to hyperion.systemd.sh
* cleaned up a couple of compiler warnings
* moved bitpair_to_byte initialiser to (hopefully) work with older GCC
* compiler warning in udp driver
removed some tabs in ws2812b.cpp
* formatting - spaces to tabs
Former-commit-id: 42cc7325177c9fcc3d1bd29cbfe72f02118d3233
