Defines starting with `h' in BSD4-4

• HANDSPREAD i386/include/vmparam.h:180
• HASBUF sys/namei.h:127
• HASHFRACTION sys/gmon.h:92
• HDHEADERLN netccitt/hdlc.h:92
• HDLCPROTO_LAP netccitt/x25.h:58
• HDLCPROTO_LAPB netccitt/x25.h:59
• HDLCPROTO_LAPD netccitt/x25.h:61
• HDLCPROTO_UNSET netccitt/x25.h:60
• HDR1_FMT22 stand.att/saio.h:81
• HDR1_OKSCT stand.att/saio.h:82
• HDR1_SSF stand.att/saio.h:83
• HEADER netiso/xebec/main.c:81
• HEARTBEAT i386/isa/if_ecreg.h:123
• HIGH_NIBBLE netiso/if_cons.c:181
• HIGHPAGES i386/include/vmparam.h:59
• HISTCOUNTER sys/gmon.h:57
• HISTFRACTION sys/gmon.h:62
• HUPCL sys/termios.h:133
• HW_BYTEORDER sys/sysctl.h:214
• HW_DISKNAMES sys/sysctl.h:218
• HW_DISKSTATS sys/sysctl.h:219
• HW_MACHINE sys/sysctl.h:211
• HW_MAXID sys/sysctl.h:220
• HW_MODEL sys/sysctl.h:212
• HW_NCPU sys/sysctl.h:213
• HW_PAGESIZE sys/sysctl.h:217
• HW_PHYSMEM sys/sysctl.h:215
• HW_USERMEM sys/sysctl.h:216
• HZ i386/isa/wt.c:153