net: increase network family autoselection timeout to 500ms #82

Job	Run time
x86_64-linux: with shared libraries	33m 20s
aarch64-linux: with shared libraries	27m 40s
x86_64-darwin: with shared libraries	1h 0m 27s
aarch64-darwin: with shared libraries	47m 28s
	2h 48m 55s

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