network: fixed a wrong data type used for an option #9860

Job	Run time
run-ubuntu-unit-tests (-DFLB_JEMALLOC=On, gcc)	13m 38s
run-ubuntu-unit-tests (-DFLB_JEMALLOC=On, clang)	13m 39s
run-ubuntu-unit-tests (-DFLB_JEMALLOC=Off, gcc)	13m 16s
run-ubuntu-unit-tests (-DFLB_JEMALLOC=Off, clang)	13m 15s
run-ubuntu-unit-tests (-DFLB_SMALL=On, gcc)	13m 33s
run-ubuntu-unit-tests (-DFLB_SMALL=On, clang)	14m 7s
run-ubuntu-unit-tests (-DSANITIZE_ADDRESS=On, gcc)	13m 0s
run-ubuntu-unit-tests (-DSANITIZE_ADDRESS=On, clang)	12m 56s
run-ubuntu-unit-tests (-DSANITIZE_UNDEFINED=On, gcc)	13m 7s
run-ubuntu-unit-tests (-DSANITIZE_UNDEFINED=On, clang)	13m 4s
run-ubuntu-unit-tests (-DFLB_COVERAGE=On, gcc)	46m 22s
run-ubuntu-unit-tests (-DFLB_SANITIZE_MEMORY=On, gcc)	12m 49s
run-ubuntu-unit-tests (-DFLB_SANITIZE_MEMORY=On, clang)	12m 53s
run-ubuntu-unit-tests (-DFLB_SANITIZE_THREAD=On, gcc)	12m 53s
run-ubuntu-unit-tests (-DFLB_SANITIZE_THREAD=On, clang)	12m 44s
run-macos-unit-tests (-DFLB_JEMALLOC=Off)	12m 50s
run-macos-unit-tests (-DFLB_SANITIZE_MEMORY=On)	12m 34s
run-macos-unit-tests (-DFLB_SANITIZE_THREAD=On)	13m 22s
Unit tests (matrix)	1s
	4h 30m 3s

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