util: fix nested proxy inspection #1615

Job	Run time
Build slim tarball	1m 32s
aarch64-linux: with shared libraries	2h 23m 47s
x86_64-darwin: with shared libraries	2h 55m 32s
aarch64-darwin: with shared libraries	2h 48m 12s
x86_64-linux: with shared libraries	2h 29m 25s
	10h 38m 28s

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