Macros starting with `x' in bsd/netccitt

• X25CSBITS bsd/netccitt/pk_var.h:223
• X25GBITS bsd/netccitt/pk_var.h:221
• X25SBITS bsd/netccitt/pk_var.h:222
• XIFA bsd/netccitt/pk_llcsubr.c:147
• XTRACTPKP bsd/netccitt/pk_llcsubr.c:138