As QNX claims to support abstract Unix-domain sockets, its getsockname
always returns for socket that has not been bound to local name
address_len of sun_path as maximum length (106) even when it does not
contain valid address.
https://www.qnx.com/developers/docs/7.1/index.html#com.qnx.doc.neutrino.lib_ref/topic/u/unix_proto.html
Pick-to: 6.2 6.3
Change-Id: I0f0f5c05611c8db6af35377dde16450f58c83c56
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>