+20120428
+ + fix some inconsistencies between vt320/vt420, e.g., cnorm/civis -TD
+ + add eslok flag to dec+sl -TD
+ + dec+sl applies to vt320 and up -TD
+ + drop wsl width from xterm+sl -TD
+ + reuse xterm+sl in putty and nsca-m -TD
+ + add ansi+tabs to vt520 -TD
+ + add ansi+enq to vt220-vt520 -TD
+ + fix a compiler warning in example in ncurses-intro.doc (Paul Waring).
+ + added paragraph in keyname manpage telling how extended capabilities
+ are interpreted as key definitions.
+ + modify tic's check of conflicting key definitions to include extended
+ capability strings in addition to the existing check on predefined
+ keys.
+