File type magic signatures chosen based on the extensions supported
by Rust delharc crate.

See: https://docs.rs/delharc/latest/delharc/

Added a test that verifies extraction of two specific files from a set
of LZH files created with this utility:

https://github.com/jca02266/lha

Primarily this commit fixes an issue with the size of the parameters
passed to cli_checklimits(). The parameters were "unsigned long", which
varies in size depending on platform.
I've switched them to uint64_t / u64.

While working on this, I observed some concerning warnigns on Windows,
and some less serious ones, primarily regarding inconsistencies with
`const` parameters.

Finally, in `scanmem.c`, there is a warning regarding use of `wchar_t *`
with `GetModuleFileNameEx()` instead of `GetModuleFileNameExW()`.
This made me realize this code assumes we're not defining `UNICODE`,
which would have such macros use the 'A' variant.
I have fixed it the best I can, although I'm still a little
uncomfortable with some of this code that uses `char` or `wchar_t`
instead of TCHAR.

I also remove the `if (GetModuleFileNameEx) {` conditional, because this
macro/function will always be defined. The original code was checking a
function pointer, and so this was a bug when integrating into ClamAV.

Regarding the changes to `rijndael.c`, I found that this module assumes
`unsigned long` == 32bits. It does not.
I have corrected it to use `uint32_t`.

You only need to escape % for print statements, using a second %.

No point shifting a 16bit variable more than 16 bits.

Also add extra NULL terminator and inline documentation.

The delharc crate used to add LZH archive support appears to add
a dependency on macOS CoreFoundation library.

The error is:

[ 78%] Linking C shared library libclamav.dylib
Undefined symbols for architecture x86_64:
  "_CFRelease", referenced from:
      iana_time_zone::platform::get_timezone_inner::hc7da204717a39974 in libclamav_rust.a(iana_time_zone-bc4762a47da73d72.iana_time_zone.1863eb20d202562a-cgu.0.rcgu.o)
...
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [libclamav/libclamav.12.0.2.dylib] Error 1

We already link with CoreFoundation for libfreshclam and clamsubmit, so
this commit extends that to libclamav as well.

We have 2 new variations on the statx false positive,
this time from calls from the Rust code.
I'm removing the mangled symbol to simplify the rule and accomodate
future variations.