Configurable socket queue size #2403

Job	Run time
macOS [UBSAN] [lmdb \| clang]	41m 26s
Linux [UBSAN] [lmdb \| clang]	38m 30s
macOS [ASAN] [lmdb \| clang]	27m 26s
Linux [ASAN] [lmdb \| clang]	37m 45s
macOS [TSAN] [lmdb \| clang]	33m 15s
Linux [ASAN_INT] [lmdb \| clang] (Errors Ignored)	39m 29s
macOS [UBSAN] [rocksdb \| clang]	45m 15s
Linux [TSAN] [lmdb \| clang]	39m 38s
macOS [ASAN] [rocksdb \| clang]	40m 35s
Linux [LEAK] [lmdb \| clang]	37m 56s
macOS [TSAN] [rocksdb \| clang]	54m 51s
Linux [UBSAN] [rocksdb \| clang]	47m 37s
Linux [ASAN] [rocksdb \| clang]	52m 26s
Linux [ASAN_INT] [rocksdb \| clang] (Errors Ignored)	52m 57s
Linux [LEAK] [rocksdb \| clang]	53m 34s
	10h 42m 40s

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