r0          return 0
r1          return 1
r_1         return -1
rok         return %OK%
rce         return %CE%
rcok        return %COK%
re          return %E%
rn          return NULL
rse         {ngx_script_error (e); return;}
sce         {ngx_script_configure_error (c); return;}
g(_lb)      goto _lb
ge          goto error
