changed strncpy to strlcpy, and defined BAN_UNSAFE_FUNCTIONS which, in binary_c_code_options.h, stops various functions which are likely to cause buffer overruns from being used (e.g. strcpy, strcat, gets). This requires strlcpy instead of strncpy, hence libbsd.

Use pkg-config to get the library and C-compiler flags required for the Makefile.