This commit implements comprehensive improvements to WSSSH tools:

## Graceful Shutdown Implementation
- Added SIGINT signal handlers for both wssshc and wsssht
- Implemented graceful tunnel close on exit with 3-second timeout
- Added double Ctrl+C detection for immediate exit without waiting
- Enhanced signal handling throughout both programs
- Added tunnel_close messages for all active tunnels before shutdown

## Configuration Reload (SIGHUP)
- Implemented SIGHUP signal handling in wssshc for live configuration reload
- Added reload_configuration() function to reload services config and password
- Reloads password from config files without service restart
- Reloads services configuration from /etc/wsssh.d/ directory
- Updates connect_to_server() to support dynamic configuration reloading

## Version Information in Messages
- Added WSSSH_VERSION define to websocket.h
- Updated registration messages to include version field
- Updated tunnel_request messages to include version field
- Resolved function naming conflicts between wssshc and wsssht

## Build System and Code Organization
- Fixed compilation errors and improved code structure
- Enhanced error handling and memory management
- Improved cross-platform compatibility
- Added proper cleanup for all allocated resources

## Files Modified
- wsssd/__init__.py, config.py, server.py - Server-side improvements
- wssshd.py - Main daemon enhancements
- wssshtools/ - Complete C implementation updates
- Multiple library files for better modularity

All changes maintain backward compatibility while adding new functionality for better service management and configuration handling.