Structs starting with `x' in BSD4-4

• x25acct netccitt/x25acct.h:52
• x25bitslice netccitt/pk_var.h:181
• x25_calladdr netccitt/pk.h:108
• x25config netccitt/x25.h:125
• x25_dgproto netccitt/if_x25subr.c:677
• x25_ifaddr netccitt/pk_var.h:135
• x25opts netccitt/x25.h:99
• x25_packet netccitt/pk.h:113
• x25_sockaddr netccitt/x25.h:78