plugins left unix socket files after crash

OS: linux

The plugins is abnormally closed, such as SIGKILL, the unix socket file will be left behind, and causing a leak in some case.

why not plugin support "Abstract sockets" to resolve this case.

http://man7.org/linux/man-pages/man7/unix.7.html

> Abstract sockets
Socket permissions have no meaning for abstract sockets: the process
umask(2) has no effect when binding an abstract socket, and changing
the ownership and permissions of the object (via fchown(2) and
fchmod(2)) has no effect on the accessibility of the socket.
Abstract sockets automatically disappear when all open references to
the socket are closed.
The abstract socket namespace is a nonportable Linux extension.