* src/evo/evodb.cpp:57:29: warning: Assert statement calls a function which may have desired side effects: 'IsClean'. [assertWithSideEffect]
* src/llmq/quorums.cpp:635:37: note: Null pointer dereference
src/llmq/quorums.cpp:635:37: warning: Either the condition 'pFrom==nullptr' is redundant or there is possible null pointer dereference: pFrom. [nullPointerRedundantCheck]
src/llmq/quorums.cpp:636:81: note: Assuming that condition 'pFrom==nullptr' is not redundant
* fix a bunch of cppcheck warnings
* cppcheck: run on many more files. Enable all checks except a few ignored ones.
ignored
```
"Consider using std::transform algorithm instead of a raw loop."
"Consider using std::accumulate algorithm instead of a raw loop."
```
* ci: build specific version of cppcheck instead of install from apt
* ci: use cppcheck 2.4, remove commented out line, fix symlink
cppcheck 2.6 is latest, however causes issues
```
src/spork.cpp:135:51: warning: Analysis failed. If the code is valid then please report this failure. [cppcheckError]
```
cppcheck 2.5 appears to get into an infinite loop
* no need to check presence before insertion
* use if-init, remove redundant check
* remove redundant check
* don't remove cmake? fix macOs depends build?
* cppcheck: one per line, alphabetize
* remove duplicate cmake install
