Fix python thread

[michaelortmann]

Found by: Empus
Patch by: thommey and michaelortmann
Fixes:

One-line summary:
Fixes [20:20:20] !!! writing to nonexistent socket: 9 when using putlog() or other functions using sockets not available via thread local storage returned via threaddata() in python thread

Additional description (if needed):

Test cases demonstrating functionality (if applicable):
test.py:

import threading
import time
 
from eggdrop.tcl import putlog
 
def run_task():
    def bg_task():
       putlog("Inside background task bg_task()")
       time.sleep(5)
       putlog("Inside background task bg_task() 2")
 
    try:
        thread = threading.Thread(target=bg_task)
        putlog("Starting thread...")
        thread.start()
        putlog("Thread started successfully")
    except Exception as e:
        putlog(f"Thread failed to start: {e}")
 
putlog("Loaded Python thread test.")

Terminal 1:

$ ./eggdrop -nt BotA.conf
[...]
[20:39:30] tcl: builtin dcc call: *dcc:tcl testuser 9 pysource test.py
[20:39:30] tcl: evaluating .tcl pysource test.py
[20:39:30] Loaded Python thread test.
[20:39:30] tcl: evaluated .tcl pysource test.py, user 3.303ms sys 0.000ms
[20:39:38] tcl: builtin dcc call: *dcc:python testuser 9 run_task()
[20:39:38] Starting thread...
[20:39:38] Inside background task bg_task()
[20:39:38] Thread started successfully
[20:39:43] Inside background task bg_task() 2

Terminal 2:

$ telnet 127.0.0.1 3333
[...]
.tcl pysource test.py
[20:39:30] tcl: builtin dcc call: *dcc:tcl testuser 9 pysource test.py
[20:39:30] tcl: evaluating .tcl pysource test.py
[20:39:30] Loaded Python thread test.
[20:39:30] tcl: evaluated .tcl pysource test.py, user 3.303ms sys 0.000ms
Tcl: 
.python run_task()
[20:39:38] tcl: builtin dcc call: *dcc:python testuser 9 run_task()
[20:39:38] Starting thread...
[20:39:38] Inside background task bg_task()
[20:39:38] Thread started successfully
Python: None
[20:39:43] Inside background task bg_task() 2