ngx_strstrn() and ngx_strcasestrn()
diff --git a/src/core/ngx_string.h b/src/core/ngx_string.h
index 42d50a4..a1da15f 100644
--- a/src/core/ngx_string.h
+++ b/src/core/ngx_string.h
@@ -126,6 +126,9 @@
ngx_int_t ngx_strcasecmp(u_char *s1, u_char *s2);
ngx_int_t ngx_strncasecmp(u_char *s1, u_char *s2, size_t n);
+u_char *ngx_strstrn(u_char *s1, char *s2, size_t n);
+u_char *ngx_strcasestrn(u_char *s1, char *s2, size_t n);
+
ngx_int_t ngx_rstrncmp(u_char *s1, u_char *s2, size_t n);
ngx_int_t ngx_rstrncasecmp(u_char *s1, u_char *s2, size_t n);
ngx_int_t ngx_memn2cmp(u_char *s1, u_char *s2, size_t n1, size_t n2);
