in_statsd: Eliminate strtok operation with cfl_utils_split #43

Job	Run time
run-ubuntu-unit-tests (-DFLB_JEMALLOC=On, gcc)	13m 36s
run-ubuntu-unit-tests (-DFLB_JEMALLOC=On, clang)	13m 43s
run-ubuntu-unit-tests (-DFLB_JEMALLOC=Off, gcc)	12m 55s
run-ubuntu-unit-tests (-DFLB_JEMALLOC=Off, clang)	12m 57s
run-ubuntu-unit-tests (-DFLB_SMALL=On, gcc)	13m 2s
run-ubuntu-unit-tests (-DFLB_SMALL=On, clang)	13m 52s
run-ubuntu-unit-tests (-DSANITIZE_ADDRESS=On, gcc)	13m 10s
run-ubuntu-unit-tests (-DSANITIZE_ADDRESS=On, clang)	13m 3s
run-ubuntu-unit-tests (-DSANITIZE_UNDEFINED=On, gcc)	13m 6s
run-ubuntu-unit-tests (-DSANITIZE_UNDEFINED=On, clang)	13m 17s
run-ubuntu-unit-tests (-DFLB_COVERAGE=On, gcc)	46m 2s
run-ubuntu-unit-tests (-DFLB_SANITIZE_MEMORY=On, gcc)	12m 55s
run-ubuntu-unit-tests (-DFLB_SANITIZE_MEMORY=On, clang)	12m 53s
run-ubuntu-unit-tests (-DFLB_SANITIZE_THREAD=On, gcc)	13m 3s
run-ubuntu-unit-tests (-DFLB_SANITIZE_THREAD=On, clang)	12m 46s
run-macos-unit-tests (-DFLB_JEMALLOC=Off)	13m 6s
run-macos-unit-tests (-DFLB_SANITIZE_MEMORY=On)	12m 37s
run-macos-unit-tests (-DFLB_SANITIZE_THREAD=On)	12m 43s
Unit tests (matrix)	1s
	4h 28m 47s

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