Defines starting with `v' in bsd/netinet

• VF_HELP bsd/netinet/bootp.h:79
• VF_PCBOOT bsd/netinet/bootp.h:78
• VIFF_TUNNEL bsd/netinet/ip_mroute.h:117
• VM_NEXT bsd/netinet/bootp.h:110
• VM_STANFORD bsd/netinet/bootp.h:75