fix(pre2k): fix directory traversal and arbitrary file write vulnerabilities (#1261)

[Char0n1507]

Description

This PR fixes the Directory Traversal and Arbitrary File Write vulnerabilities reported in #1261 within the pre2k module.

Changes made:

1. Sanitizes connection.domain to remove illegal path characters (such as ../) to prevent directory traversal out of the NXC_PATH/modules/pre2k directory when writing output files.
2. Validates sAMAccountName against Microsoft's documented restrictions, ensuring it does not contain illegal characters ("[]:;|=+*?<>/\\,). If an illegal character is found, it is skipped and logged to debug instead of being written, which prevents an attacker from injecting arbitrary file contents via a malicious LDAP server.

Fixes #1261

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas

[github-actions]

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[NeffIsBack]

Hi and thanks for the PR, but I will close this one because it is duplicate to #1243. Regarding the samaccountname I'll either just implement a file jail so you can't stored data outside of the nxc folder or simply remove the samaccountname from the filename entirely.