+20170819
+ + update "iterm" entry -TD
+ + add "iterm2" entry (report by Leonardo Brondani Schenkel) -TD
+ + regenerate llib-* files.
+ + regenerate HTML manpages.
+ + improve picsmap test-program:
+ + reduce memory used for tsearch
+ + add report in log file showing cumulative color coverage.
+ + add -x option to clear/tput to make the E3 extension optional
+ (cf: 20130622).
+ + add options -T and -V to clear command for compatibility with tput.
+ + add usage message to clear command (Debian #371855).
+ + improve usage messages for tset and tput.
+ + minor fixes to "RDGB" extension and reset_color_pairs().
+