+20180526
+ + add note in curs_util.3x about unctrl.h
+ + review/improve header files to ensure that those include necessary
+ files except for the previously-documented cases (report by Isaac
+ Pascual Monells).
+ + improved test-package scripts, adapted from byacc 1.9 20180525.
+ + fix some gcc8 warnings seen in Redhat package build, but
+ work around bug in gcc8 compiler warnings in comp_parse.c
+