
Unit-test all fast-file functions
    Then convert dsv to use fast-file
    Then convert all dependent projects

Make sure free() functions don't free the parent object, since they could
be passed the address of a static or auto variable

xt_str_multi_cmp(string, "string1|string2|...");

xt_strdup_delim(const char *string, const char *delim)
    Duplicate string up to any char in delim

Add portable byte swap functions
    This is a common source of platform-specific hacks
