Add basic_parser_v1::reset

include/beast/http/basic_parser_v1.hpp

@@ -467,6 +467,15 @@ public:
     void
     write_eof(error_code& ec);
 
+protected:
+    /** Reset the parsing state.
+
+        The state of the parser is reset to expect the beginning of
+        a new request or response. The old state is discarded.
+    */
+    void
+    reset();
+
 private:
     Derived&
     impl()
@@ -486,14 +495,6 @@ private:
         s_ = s_res_start;
     }
 
-    void
-    reset()
-    {
-        h_left_ = h_max_;
-        b_left_ = b_max_;
-        reset(std::integral_constant<bool, isRequest>{});
-    }
-
     void
     init(std::true_type)
     {