Defines starting with `o' in quakeworld

• OFS_NULL quakeworld/server/pr_comp.h:29
• OFS_PARM0 quakeworld/server/pr_comp.h:31
• OFS_PARM1 quakeworld/server/pr_comp.h:32
• OFS_PARM2 quakeworld/server/pr_comp.h:33
• OFS_PARM3 quakeworld/server/pr_comp.h:34
• OFS_PARM4 quakeworld/server/pr_comp.h:35
• OFS_PARM5 quakeworld/server/pr_comp.h:36
• OFS_PARM6 quakeworld/server/pr_comp.h:37
• OFS_PARM7 quakeworld/server/pr_comp.h:38
• OFS_RETURN quakeworld/server/pr_comp.h:30
• ON_EPSILON quakeworld/client/bothdefs.h:69
• out quakeworld/client/r_aclipa.s:40