combine end and nether shaders into one group of programs. for my own ease of use.

shaders/dimensions/deferred1.vsh

@@ -0,0 +1,9 @@
+#include "/lib/settings.glsl"
+
+uniform vec2 texelSize;
+#include "/lib/res_params.glsl"
+void main() {
+	gl_Position = ftransform();
+	vec2 scaleRatio = max(vec2(0.25), vec2(18.+258*2,258.)*texelSize);
+	gl_Position.xy = (gl_Position.xy*0.5+0.5)*clamp(scaleRatio+0.01,0.0,1.0)*2.0-1.0;
+}