patches: 2 new patches (#1374)

lumps/textures/textures.cfg

@@ -3711,6 +3711,13 @@ COMPWERF        64      128
 *   PREEL2      6       84
 *   PREEL1      38      84
 
+EXITSECR        64      16 ; Secret exit sign
+*   EXIT3       0       0
+*   EXIT2       32      0
+*   EXIT2       40      0
+*   EXIT2       48      0
+*   EXIT2       56      0
+
 M_BDOOR         128     128 ; TNT keyed door, it was missing the blue version.
 *   RW33_4      0       -16
 *   RW33_4      64      -16
@@ -3728,6 +3735,9 @@ METAL8          64      128 ; METAL2 but 8 little squares.
 METAL9          64      128 ; METAL3 with no markings or panels.
 * RW33_5        0       0
 
+POSTER1         256     128 ; Goofy-looking movie poster
+* POSTER1       0       0
+
 PIPE3           256     128 ; Unused textures in doom beta, now has vines on freedoom.
 *   TP2_1       0       0
 *   TP2_2       128     0