…R 94971]

libstdc++-v3/ChangeLog:

	PR libstdc++/94971
	* include/bits/stl_algo.h (search(FIter, FIter, const Searcher):
	Adjust #if condition.
	* include/parallel/algo.h (search(FIter, FIter, const Searcher&):
	Define new overload for C++17.