Snippets for abduco 0.6 from FreeBSD 150amd64

Sourced from https://pkg-status.freebsd.org/beefy23/data/latest-per-pkg/abduco/0.6_1/150amd64-default.log.

• abduco.c:131:40: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
    131 | static inline size_t packet_header_size() {
        |                                        ^
        |                                         void
  

• ./server.c:21:31: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
     21 | static void server_sink_client() {
        |                               ^
        |                                void
  

• abduco.c:583:16: warning: '_Generic' is a C11 extension [-Wc11-extensions]
    583 |         server.name = basename(argv[0]);
        |                       ^