Add dim/smxx/rmxx to terminfo, remove duplicate kich1

st.info

@@ -25,6 +25,7 @@ st| simpleterm,
 	cuu=\E[%p1%dA,
 	dch=\E[%p1%dP,
 	dch1=\E[P,
+	dim=\E[2m,
 	dl=\E[%p1%dM,
 	dl1=\E[M,
 	ech=\E[%p1%dX,
@@ -142,7 +143,6 @@ st| simpleterm,
 	khome=\E[1~,
 	kil1=\E[2;5~,
 	krmir=\E[2;2~,
-	kich1=\E[2~,
 	knp=\E[6~,
 	kmous=\E[M,
 	kpp=\E[5~,
@@ -185,7 +185,10 @@ st| simpleterm,
 	tsl=\E]0;,
 	xenl,
 	vpa=\E[%i%p1%dd,
-# Tmux unofficial extensions, see TERMINFO EXTENSIONS in tmux(1)
+# XTerm extensions
+	rmxx=\E[29m,
+	smxx=\E[9m,
+# tmux extensions, see TERMINFO EXTENSIONS in tmux(1)
 	Se,
 	Ss,
 	Tc,