add an issue for udp connection sendto fuction

[DockTree]

Is your feature request related to a problem? Please describe.
the problem is when programs use connection function before sendto function while socktype is udp, qiling can not solve the parameter because in this condition, sendto will not have sockaddr parameter. just like the image below.

although, most of time we would not use connection while using udp socket. It do have some programs use it.

Describe the solution you'd like
the solution is simple, add the code in /usr/games/qilingenv/lib/python3.10/site-packages/qiling/os/posix/syscall/socket.py line 852

if addr == 0:
return ql_syscall_send(ql, sockfd, buf, length, flags)

the reason is after connection function, sendto function would not have sockaddr parameter.

[elicn]

Per Linux documentation, calling sendto with NULL addr arg and 0 addlen is equivalent to calling send. I fixed it also for recvfrom, which bahaves similarly.