Duplication and divergence of signconf configuration parsing.

The source files signer/src/parser/signconfparser.[ch] and enforcer/src/parser/signconfparser.[ch] are diverged, but should parse the exact same kind of configuration file. Hence they should work the same. The have common origins and should not have diverged.
The seemingly necessity of divergence, to create different datastructures for enforcer and signer is actually a design flaw, configuration parsing should be independent of the application implementation.
The duplication of symbols is hidden.