unix,win: add uv_udp_try_send2 #50

Job	Run time
build-android	4m 23s
build-ios (macos-13)	1m 20s
build-cross-qemu-arm	2m 15s
build-ios (macos-14)	1m 43s
build-cross-qemu-armhf	1m 54s
build-cross-qemu-aarch64	1m 53s
build-macos (macos-13)	2m 54s
build-cross-qemu-riscv64	2m 5s
build-linux	1m 30s
build-macos (macos-14)	2m 21s
build-cross-qemu-ppc	1m 52s
build-cross-qemu-ppc64	1m 51s
build-cross-qemu-ppc64le	1m 49s
build-cross-qemu-s390x	1m 49s
build-cross-qemu-mips	2m 32s
build-cross-qemu-mips64	1m 47s
build-cross-qemu-mipsel	1m 47s
build-cross-qemu-mips64el	1m 57s
build-cross-qemu-arm (u64 slots)	1m 44s
build-cross-qemu-aarch64 (u64 slots)	2m 0s
build-cross-qemu-ppc (u64 slots)	1m 53s
build-cross-qemu-ppc64 (u64 slots)	1m 45s
	45m 4s

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