Structs starting with `r' in bsd/sys

• radvisory bsd/sys/fcntl.h:213
• rawarc bsd/sys/gmon.h:135
• rawarc_order bsd/sys/gmon.h:211
• reg_desc bsd/sys/syslog.h:293
• reg_values bsd/sys/syslog.h:284
• rlimit bsd/sys/resource.h:124
• rusage bsd/sys/resource.h:81