Check with max length of path 107 for unix sockets
Check with max length of path 107 for unix sockets

* man 7 unix says:
  * The pathname in sun_path should be null-terminated.
  * The length of the pathname, including the terminating null byte, should not exceed the size of sun_path (108).
* Linux and MRI seem to accept not null-terminated paths but it is not worth risking to fail these specs.

sgarciac/spec,ruby/spec,nobu/rubyspec,ruby/rubyspec,ruby/rubyspec,eregon/rubyspec,nobu/rubyspec,eregon/rubyspec,ruby/spec,eregon/rubyspec,nobu/rubyspec,sgarciac/spec,ruby/spec,sgarciac/spec