Log Message:
byacc: update to 20230219.

2023-02-19  Thomas E. Dickey  <dickey@invisible-island.net>

	* test/yacc/ok_syntax1.tab.h, test/yacc/ok_syntax1.tab.c,
	  test/btyacc/ok_syntax1.tab.h, test/btyacc/ok_syntax1.tab.c:
	regen

	* test/ok_syntax1.y:
	modify test for %union to add tag for testing reader.c

	* reader.c:
	provide for a named union, e.g., "%union foo" by detecting the name and
	deferring the typedef in that case until the end of copying the union
	definition (report by Dag-Erling Smørgrav).