Use native hash functions instead of obsolete external binaries

[StudioMaX]

• hash_* functions supported since PHP 5 >= 5.1.2, PHP 7, PECL hash >= 1.1. They are enabled by-default (https://www.php.net/manual/en/hash.installation.php)

As of PHP 5.1.2, the Hash extension is bundled and compiled into PHP by default.
It may be explicitly disabled by using the --disable-hash switch to configure. Earlier versions of PHP may incorporate the Hash extension by installing the » PECL module.
As of PHP 7.4.0, the Hash extension is a core PHP extension, so it is always enabled.

• Remove obsolete md5sum.exe, sha1sum.exe, tail.exe

getid3_lib::CopyFileParts is now also not used, but I did not delete it because it is declared as public and someone can use it.

@JamesHeinrich can you please check this on your set of media files?