added F1-12 key, fixed DCH and ICH.

st.info

@@ -37,6 +37,18 @@ st| simpleterm,
 	kcuu1=\E[A,
 	kdch1=\E[3~,
 	kend=\E[4~,
+	kf1=\EOP,
+	kf2=\EOQ,
+	kf3=\EOR,
+	kf4=\EOS,
+	kf5=\E[15~,
+	kf6=\E[17~,
+	kf7=\E[18~,
+	kf8=\E[19~,
+	kf9=\E[20~,
+	kf10=\E[21~,
+	kf11=\E[23~,
+	kf12=\E[24~,
 	khome=\E[1~,
 	knp=\E[6~,
 	kpp=\E[5~,