Add command-line programs for TFTP operations:
tftpd - TFTP server daemon:
- Configurable root directory for serving files
- Optional write support with --writable flag
- Optional file overwriting with --overwrite flag
- Custom port binding (default: 69)
- Path traversal protection for security
tftp - TFTP client:
- get command for downloading files
- put command for uploading files
- Support for both octet and netascii modes
- Verbose mode for debugging
Also adds comprehensive integration tests that verify client-server
communication with real network I/O.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
