Structs starting with `r' in bsd/sys

• radvisory bsd/sys/fcntl.h:231
• rawarc bsd/sys/gmon.h:132
• rawarc_order bsd/sys/gmon.h:208
• reg_desc bsd/sys/syslog.h:290
• reg_values bsd/sys/syslog.h:281
• rlimit bsd/sys/resource.h:121
• rusage bsd/sys/resource.h:78