Adding setb and setf and a comment about terminfo installation.

Makefile

@@ -48,6 +48,8 @@ install: all
 	@mkdir -p ${DESTDIR}${MANPREFIX}/man1
 	@sed "s/VERSION/${VERSION}/g" < st.1 > ${DESTDIR}${MANPREFIX}/man1/st.1
 	@chmod 644 ${DESTDIR}${MANPREFIX}/man1/st.1
+	@echo If things do not seem to work, be sure that there is no \
+		floating st terminfo in the .terminfo directory in your home dir.
 	@tic -s st.info
 
 uninstall:

st.info

@@ -91,6 +91,8 @@ st| simpleterm,
 	sc=\E7,
 	setab=\E[4%p1%dm,
 	setaf=\E[3%p1%dm,
+	setb=\E[4%?%p1%{1}%=%t4%e%p1%{3}%=%t6%e%p1%{4}%=%t1%e%p1%{6}%=%t3%e%p1%d%;m,
+	setf=\E[3%?%p1%{1}%=%t4%e%p1%{3}%=%t6%e%p1%{4}%=%t1%e%p1%{6}%=%t3%e%p1%d%;m,
 	sgr0=\E[0m,
 	sgr=%?%p9%t\E(0%e\E(B%;\E[0%?%p6%t;1%;%?%p2%t;4%;%?%p1%p3%|%t;7%;%?%p4%t;5%;%?%p7%t;8%;m,
 	smacs=\E(0,