Configuration options can be overridden by setting env values

Remove two sneaky log_debug

Refactoring louloulibs and cmake

Use OBJECT libraries
Remove the louloulibs directory
Write FOUND variables in the cache

Remove all the libs that are now in louloulibs

Fix a few issues reported by static analyzers

Upgrade to C++14

Reload the conf on SIGUSR1/2

Include stdlib.h for atoi

Add a Config module, and use it to get the password from a file