Macros starting with `x' in bsd/netccitt

• X25CSBITS bsd/netccitt/pk_var.h:220
• X25GBITS bsd/netccitt/pk_var.h:218
• X25SBITS bsd/netccitt/pk_var.h:219
• XIFA bsd/netccitt/pk_llcsubr.c:144
• XTRACTPKP bsd/netccitt/pk_llcsubr.c:135