cdk: Update to 5.0-20190303

Changes:

2019/03/03
+ deprecate installCDKLibrary rule by install.libs, which is used in
  the newer shared-library macros.
+ conditionally-comment action lines for the part of install-rules
  which conflict with the newer shared-library rules (report by Tom
  Brownridge).

2019/02/24
+ use HDR_ROOTNAME rather than PACKAGE in top-level makefile, to
  simplify building cdk and cdkw packages with non-conflicting paths.
+ add "check" rule to top-level makefile, for testing Arch Linux
  package.
+ modify test-package for RPMs to work with SUSE and Mageia.

2019/02/20
+ updated rpm spec-file, for test-builds.
+ added pkgsrc files, for test-builds.
+ updated FreeBSD port-files, for test-builds.
+ add getCdkTitle, which uses new display encoding "<#10>" for newline
  in the example which demonstrates it, mentry_ex2 (prompted by
  discussion with St辿phane Goujet).
+ fix similar memory leaks in setCDKRadioItems and setCDKSelectionItems
+ fix memory leak in setCDKScrollItems (report by St辿phane Goujet).
+ make functionKey parameter to getchCDKObject optional
  (suggested by St辿phane Goujet).
+ modify test-packages to adjust includes in cdk.h when using test
  package for ncurses6 which would confuse test-package for cdk-perl.
+ change shlib-version in test-package to "abi", for better
  compatibility with the test-package for cdk-perl.
+ add manpage for cdk5-config
+ documentation improvements (report by St辿phane Goujet).
+ add check in drawCDKScrollCurrent() in case the list is not
  initialized (report by St辿phane Goujet).
+ modify writeCharAttrib to replace the color in the target cell rather
  than OR'ing it from the source-attribute (patch by Aarian P. Aleahmad)
+ add a null-pointer check in viewer.c's PatternNotFound() function
  (report by "c").
+ improve macros/markup in manpages.
+ updated configure macros, from lynx and ncurses development:
  CF_ADD_INCDIR, CF_CC_ENV_FLAGS, CF_CURSES_CPPFLAGS, CF_CURSES_LIBS,
  CF_FIND_LINKAGE, CF_GCC_WARNINGS, CF_GNU_SOURCE, CF_LD_RPATH_OPT,
  CF_NCURSES_CONFIG, CF_PDCURSES_X11, CF_POSIX_C_SOURCE, CF_PROG_EXT,
  CF_SHARED_OPTS, CF_TRY_XOPEN_SOURCE, CF_WITH_VERSIONED_SYMS,
  CF_XOPEN_CURSES, CF_XOPEN_SOURCE, CF_X_ATHENA_CPPFLAGS
+ update config.guess, config.sub

(nia)