Add syslog supports (#2537) #1589

Job	Run time
macos-aarch64	2m 41s
minver	14s
macos	4m 31s
linux_native_builds (x86_64-unknown-linux-gnu)	3m 5s
rustfmt	15s
linux_native_builds (x86_64-unknown-linux-musl)	3m 18s
rust_stable	1m 35s
tier3 (x86_64-unknown-dragonfly)	59s
tier3 (x86_64-unknown-openbsd)	1m 3s
tier3 (x86_64-unknown-haiku)	55s
tier3 (armv7-unknown-linux-uclibceabihf)	1m 6s
tier3 (i686-unknown-hurd-gnu)	56s
redox	42s
cross (arm-unknown-linux-gnueabi)	1m 52s
cross_compiling (aarch64-linux-android)	39s
cross (armv7-unknown-linux-gnueabihf)	1m 48s
cross_compiling (arm-linux-androideabi)	36s
cross (i686-unknown-linux-gnu)	1m 58s
cross_compiling (armv7-linux-androideabi)	34s
cross (i686-unknown-linux-musl)	1m 59s
cross_compiling (i686-linux-android)	36s
cross (mips-unknown-linux-gnu)	1m 56s
cross_compiling (x86_64-linux-android)	38s
cross (mips64-unknown-linux-gnuabi64)	1m 57s
cross_compiling (arm-unknown-linux-musleabi)	38s
cross (mips64el-unknown-linux-gnuabi64)	1m 58s
cross_compiling (x86_64-unknown-fuchsia)	37s
cross (mipsel-unknown-linux-gnu)	1m 58s
cross_compiling (x86_64-unknown-illumos)	32s
cross (powerpc64le-unknown-linux-gnu)	1m 51s
cross_compiling (aarch64-apple-ios, true)	30s
cross (loongarch64-unknown-linux-gnu)	2m 0s
cross_compiling (powerpc64-unknown-linux-gnu)	43s
cross_compiling (s390x-unknown-linux-gnu)	49s
cross_compiling (x86_64-unknown-linux-gnux32)	39s
cross_compiling (x86_64-unknown-netbsd)	38s
	48m 46s

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