Suricata

More details can be found in the parent issue.

This task covers the following files:
- app-layer-dcerpc-common.h
- app-layer-dnp3.c
- app-layer-dnp3.h
- app-layer-htp-libhtp.c
- app-layer-htp-libhtp.h
- app-layer-htp-mem.h
- app-layer-smb.c
- app-layer-smb.h
- app-layer.h
- autoconf.h

Let's start with one commit per file, and if we realize they could be just one commit, they can be squashed :)