Adding a drop_undefined conf option to drop undefined traps (#658) #222

Job	Run time
build (centos, 7, rpm, centos)	3m 4s
build (centos, 8, rpm, centos)	4m 42s
build (ubi9, 9.2, rpm, redhat/ubi9)	3m 1s
build (ubuntu, focal, deb, ubuntu)	3m 6s
build (ubuntu, jammy, deb, ubuntu)	2m 48s
build (ubuntu, lunar, deb, ubuntu)	2m 59s
build (debian, bullseye, deb, debian)	2m 58s
build (debian, buster, deb, debian)	2m 51s
build (debian, bookworm, deb, debian)	3m 5s
	28m 34s

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