Structs starting with `h' in bsd4-4

• hbadriver dev/scsi/scsivar.h:145
• hba_softc dev/scsi/scsivar.h:103
• hdcb netccitt/hd_var.h:52
• Hdlc_frame netccitt/hdlc.h:95
• Hdlc_iframe netccitt/hdlc.h:68
• Hdlc_sframe netccitt/hdlc.h:74
• hdlctrace netccitt/hd_debug.c:60
• Hdlc_uframe netccitt/hdlc.h:79
• hdtxq netccitt/hd_var.h:47
• hpte i386/include/pte.h:77