Log Message:
vttest: update to 20190105.

Provided by Thomas Dickey in private email.

20190105
	+ added/updated port-files from pkgsrc for test-builds.

	+ updated port-files from FreeBSD for test-builds.

	+ updated/improved configure macros
	  CF_CC_ENV_FLAGS, CF_GNU_SOURCE, CF_POSIX_C_SOURCE, CF_XOPEN_SOURCE

	+ update config.guess, config.sub

20181116
	+ improve mouse-tracking test, logging the decoded button- and
	  modifier-information as well as fixing a special case for button 6.

20180911
	+ add "-V" option, for version information.
	+ ensure logfile is flushed after each command.
	+ demonstrate DECRQCRA with GR, checked with VT520 screenshot.
	+ improve DECRQCRA test, demonstrating treatment of whitespace and
	  video attributes by DEC terminals, seen in VT520 screenshots.
	+ modify locking-shift test, changing the default GR character set to
	  match hardware terminals more closely, e.g., setting it to Latin-1.
	+ add/improve character-set table entries for xterm #336.
	+ modify CNL test to demonstrate its treatment of zero as default.
	+ revise DECRQCRA test to match VT520 screenshots from Markus Schmidt

20180811
	+ recent BSD-make mishandled .1.cat rule; fix

20180728
	+ update xterm DECRPM table

20180725
	+ remove obsolete message about diagonal in DECIC/DECDC test; since
	  xterm #315 the test result is on the margin.

	+ fix an off-by-one in right-margin for ICH/DCH test.

	+ add tests for DECRSPS for xterm #334.

	+ improve formatting of highlighted response-strings, fixing a problem
	  with wrapping.

20180702
	+ updated test-packages to use recommended flags.

	+ improved DECRQCRA check, updating to work with xterm #334.

	+ add tests for xterm's extensions to DECSCUSR.

	+ updated/improved configure macros

	+ update config.guess, config.sub

20150706
	+ add configure option --with-man2html

	+ update config.guess, config.sub