Defines starting with `l' in netiso

• lc_flags netiso/iso_snpac.h:105
• lc_ht netiso/iso_snpac.h:104
• LISTENING netiso/cons_pcb.h:130
• LITTLE_ENDIAN netiso/clnp.h:72
• LLC_SIZE netiso/iso_snpac.c:166
• LOCAL_CREDIT_EXPAND netiso/tp_subr2.c:77
• LOW_NIBBLE netiso/if_cons.c:191