bio: pass flags on BIO_ctrl to make flush retriable #902

Job	Run time
compiler (gcc-7, ubuntu-20.04)	6m 37s
compiler (gcc-8, ubuntu-20.04)	6m 14s
compiler (gcc-9, ubuntu-20.04)	6m 16s
compiler (gcc-10, ubuntu-20.04)	7m 38s
compiler (gcc-11, ubuntu-22.04)	7m 39s
compiler (gcc-12, ubuntu-22.04)	8m 8s
compiler (gcc-13, ubuntu-22.04, ubuntu-toolchain-r/test)	7m 3s
compiler (clang-6.0, ubuntu-20.04)	1m 56s
compiler (clang-7, ubuntu-20.04)	1m 58s
compiler (clang-8, ubuntu-20.04)	1m 54s
compiler (clang-9, ubuntu-20.04)	8m 3s
compiler (clang-10, ubuntu-20.04)	7m 52s
compiler (clang-11, ubuntu-20.04)	6m 17s
compiler (clang-12, ubuntu-20.04)	7m 38s
compiler (clang-13, ubuntu-22.04)	6m 40s
compiler (clang-14, ubuntu-22.04)	6m 33s
compiler (clang-15, ubuntu-22.04, jammy)	6m 40s
compiler (clang-16, ubuntu-22.04, jammy)	6m 48s
	1h 51m 54s

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