Defines starting with `f' in bsd/net

• FAILMSG bsd/net/if_spppsubr.c:3190
• FILTER_LEN bsd/net/dlil_ethersubr.c:970
• FINISH_STATE bsd/net/zlib.c:311
• FIRST bsd/net/bsd_comp.c:195
• FIXEDH bsd/net/zlib.c:4477
• FLUSH bsd/net/zlib.c:3605
• FRAME_END bsd/net/if_sl.c:195
• FRAME_ESCAPE bsd/net/if_sl.c:196
• Freq bsd/net/zlib.c:327