Modify wget command to use the new RateLimiter class to prevent attackers
from abusing the honeypot to launch DDoS attacks against external targets.

Changes:
- Import and initialize RateLimiter with wget-specific configuration
- Add rate limit check before processing any download request
- Simulate realistic connection timeout when rate limit is exceeded
- Use configurable parameters from CowrieConfig with sensible defaults:
  * wget_rate_limit_enabled (default: true)
  * wget_rate_limit_requests (default: 5)
  * wget_rate_limit_window (default: 60 seconds)
  * wget_rate_limit_max_hosts (default: 1000)

When rate limited, the command now shows a connection timeout error
indistinguishable from a real network failure, preventing attackers
from detecting the rate limiting mechanism.

Note: cowrie.cfg has not been modified in this commit. The rate limiter
will use the default values until explicit configuration is added.
The feature can be disabled by setting wget_rate_limit_enabled=false
in the configuration file.

This change maintains full backward compatibility while adding protection
against abuse.

…or()

- Align usage output with real netcat-openbsd
- Method name better reflects its purpose (uniform with wget command)

- Distinguish between invalid option and missing argument errors
- Match real nc error output format

Listen mode not implemented, but errors match real nc behavior.

Non-blocking connect not implemented, use timeout as workaround.

Show success/failure messages matching real nc output format.

…lint false positive