Finally resolving the backspace problem.

The majority now using the Linux behaviour. Minorities have to live in their
ghettos.

st.info

@@ -53,7 +53,7 @@ st| simpleterm,
 	ka3=\E[5~,
 	kc1=\E[4~,
 	kc3=\E[6~,
-	kbs=\010,
+	kbs=\177,
 	kcbt=\E[Z,
 	kb2=\EOu,
 	kcub1=\EOD,
@@ -73,7 +73,7 @@ st| simpleterm,
 	kri=\E[1;2A,
 	kclr=\E[3;5~,
 	kdl1=\E[3;2~,
-	kdch1=\177,
+	kdch1=\E[3~,
 	kich1=\E[2~,
 	kend=\E[4~,
 	kf1=\EOP,