Allow and add warning for HTTP anchor-data #4254

Job	Run time
build (9.10, 3.12, ubuntu-latest, bash)	3m 48s
build (9.10, 3.12, ubuntu-latest, bash)	3m 38s
build (9.10, 3.12, windows-latest, C:/msys64/usr/bin/bash.exe -e {0})	11m 25s
build (9.10, 3.12, windows-latest, C:/msys64/usr/bin/bash.exe -e {0})	11m 25s
build (9.6, 3.12, windows-latest, C:/msys64/usr/bin/bash.exe -e {0})	11m 22s
build (9.6, 3.12, windows-latest, C:/msys64/usr/bin/bash.exe -e {0})	11m 22s
build (9.6, 3.12, ubuntu-latest, bash)	6m 0s
build (9.6, 3.12, ubuntu-latest, bash)	6m 0s
build (9.8, 3.12, ubuntu-latest, bash)	3m 45s
build (9.8, 3.12, ubuntu-latest, bash)	3m 45s
build (9.8, 3.12, windows-latest, C:/msys64/usr/bin/bash.exe -e {0})	7m 51s
build (9.8, 3.12, windows-latest, C:/msys64/usr/bin/bash.exe -e {0})	7m 51s
build-complete	1s
build-complete	1s
	1h 28m 14s

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