patch 9.2.0516: socketserver: spurious error when servername is taken

patch 9.2.0516: socketserver: spurious error when servername is taken

Problem:  socketserver: when searching for a free socket path,
          socketserver_get_path() emits an error for each name that is
          already in use (after v9.2.0512).
Solution: Add an "ignore" argument to socketserver_get_path() to
          suppress the error (Foxe Chen).

Signed-off-by: Foxe Chen <chen.foxe@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Signed-off-by: Foxe Chen <chen.foxe@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>