- fix one more no-return-in-nonvoid-function issue in ipmievd.c

- Fixed several compiler warnings (bnc#371131, bnc#480347, bnc#439490,
bnc#525831, bnc#534909) and quite some more.

- Update to version 1.8.11
- Fix segfault when doing firmware upgrades with too big FW files
- Be more verbose why a firmware update does not match