2017/01/31
+ use DLG_TRACE macro consistently to make "--disable-trace" configure
option work.
+ modify buildlist widget to support option "--reorder" for to allow
user to reorder the data based on the sequence of selections
(discussion with Paraic O'Ceallaigh).
+ fill background color on unused parts of buildlist.
+ fix a minor error in buildlist which let pageup switch columns.
+ change several calls to dlg_trace_msg to prefix with "#" to make
the trace logs more consistent for parsing.
+ add samples/run_test.sh
+ further improve performance with very long command-lines by changes
to howmany_tags().
+ modify dlg_string_to_argv() to convert escaped double-quotes to
plain double-quotes when within a double-quoted string.
+ modify makefile to apply CFLAGS to linking
+ modify dlg_string_to_argv() to ignore escaped newlines except when
quoted, fixing a problem with samples/checklist9.
+ interpret $DIALOGOPTS before expanding "--file", etc., to allow
the environment variable to turn on tracing in that process.
+ improve performance when processing very long command lines, e.g.,
using "--file" by changing dialog_opts[] to an array of pointers to
the expanded argv[] (discussion with Lars Tauber).
+ modified autoconf macros
+ CF_CC_ENV_FLAGS amend the last change to move only the
preprocessor, optimization and warning flags to CPPFLAGS and
CFLAGS, leaving the residue in CC. That happens to work for gcc's
various "model" options, but may require tuning for other compilers
+ CF_LARGEFILE workaround for clang exit-code vs warnings
+ CF_MATH_LIB quiet strict gcc warning
+ CF_WITH_LIBTOOL fix a few places in configure/build scripts where
DESTDIR and rpath were combined
+ CF_XOPEN_SOURCE add "uclinux" to list of Linux's
+ update config.guess, config.sub
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