textures: add a few unused patches. (#1061)

* textures: add GRAYRED and GRAYWIDE.

Also address #48 with respect to GRAYRED.

* textures: add AQPIPE06-7 and BROWN4.

The latter is called "BIGDOR6A" as the alternative BIGDOOR6.

lumps/textures/textures.cfg

@@ -111,6 +111,10 @@ GRAYTALG    		128	128
 *	WALL00_4    	80	0
 GRAYWARN    		64	128
 *	GRAYWARN      	0	0
+GRAYRED	    		64	128
+*	GRAYRED      	0	0
+GRAYWIDE    		128	128
+*	GRAYWIDE      	0	0
 GRAYVINE    		256	128
 *	WALL00_1    	192	0
 *	WALL00_1    	64	0
@@ -1688,6 +1692,8 @@ BIGDOOR6        128     112
 *   DOOR11_1    -48     0
 *   DOOR11_1    32      0
 *   DOOR11_1    5       0
+BIGDOR6A        128     128
+*   BROWN4      0       0
 BLODRIP1        32      128
 *   RP2_1       0       0
 BLODRIP2        32      128
@@ -3298,6 +3304,10 @@ AQPIPE04                64      128
 *       AQPIPE04        0       0
 AQPIPE05                64      128
 *       AQPIPE05        0       0
+AQPIPE06                64      128
+*       AQPIPE06        0       0
+AQPIPE07                128     128
+*       AQPIPE07        0       0
 AQPIPE08                64      128
 *       AQPIPE08        0       0
 AQPIPE09                128     128