The type of name used by a GUnixSocketAddresss.
g_unix_socket_address_path indicates a traditional unix domain socket bound to a filesystem
path. g_unix_socket_address_anonymous indicates a socket not bound to any name (eg, a
client-side socket, or a socket created with socketpair).
For abstract sockets, there are two incompatible ways of naming them; the man pages suggest using the entire `struct sockaddr_un` as the
name, padding the unused parts of the sun_path field with zeroes; this corresponds to
g_unix_socket_address_abstract_padded. However, many programs instead just use a portion of
sun_path, and pass an appropriate smaller length to bind or connect
. This is g_unix_socket_address_abstract.