REVIEWED: DrawRectangleLines() #3884

For consistency, now _almost_ all `Draw*Lines()` functions use `RL_LINES` mode for drawing. It solves the linked issue but it can have other implications, as mentioned in the WARNING comment in `DrawRectangleLines()`.

Side note: `DrawRectangleRoundedLines()` now should be reviewed for consistency.

src/raylib.h

@@ -1255,7 +1255,8 @@ RLAPI void DrawRectangleGradientEx(Rectangle rec, Color col1, Color col2, Color
 RLAPI void DrawRectangleLines(int posX, int posY, int width, int height, Color color);                   // Draw rectangle outline
 RLAPI void DrawRectangleLinesEx(Rectangle rec, float lineThick, Color color);                            // Draw rectangle outline with extended parameters
 RLAPI void DrawRectangleRounded(Rectangle rec, float roundness, int segments, Color color);              // Draw rectangle with rounded edges
-RLAPI void DrawRectangleRoundedLines(Rectangle rec, float roundness, int segments, float lineThick, Color color); // Draw rectangle with rounded edges outline
+RLAPI void DrawRectangleRoundedLines(Rectangle rec, float roundness, int segments, Color color);         // Draw rectangle lines with rounded edges
+RLAPI void DrawRectangleRoundedLinesEx(Rectangle rec, float roundness, int segments, float lineThick, Color color); // Draw rectangle with rounded edges outline
 RLAPI void DrawTriangle(Vector2 v1, Vector2 v2, Vector2 v3, Color color);                                // Draw a color-filled triangle (vertex in counter-clockwise order!)
 RLAPI void DrawTriangleLines(Vector2 v1, Vector2 v2, Vector2 v3, Color color);                           // Draw triangle outline (vertex in counter-clockwise order!)
 RLAPI void DrawTriangleFan(Vector2 *points, int pointCount, Color color);                                // Draw a triangle fan defined by points (first vertex is the center)