+20120421
+ + improve cleanup of temporary files in tic using atexit().
+ + add msgr to vt420, similar DEC vtXXX entries -TD
+ + add several missing vt420 capabilities from vt220 -TD
+ + factor out ansi+pp from several entries -TD
+ + change xterm+sl and xterm+sl-twm to include only the status-line
+ capabilities and not "use=xterm", making them more generally useful
+ as building-blocks -TD
+ + add dec+sl building block, as example -TD
+