Optimization: Do not zero-terminate Server::inBuf (#1889) #3678

Job	Run time
functionality-tests	17m 34s
source-maintenance-tests	2m 56s
CodeQL-tests	24m 38s
build-tests(ubuntu-22.04,gcc,default)	11m 45s
build-tests(ubuntu-22.04,gcc,minimal)	6m 13s
build-tests(ubuntu-22.04,gcc,maximus)	13m 45s
build-tests(ubuntu-22.04,clang,default)	13m 24s
build-tests(ubuntu-22.04,clang,minimal)	7m 39s
build-tests(ubuntu-22.04,clang,maximus)	15m 46s
build-tests(macos-14,clang,default)	13m 13s
build-tests(macos-14,clang,minimal)	6m 26s
build-tests(macos-14,clang,maximus)	15m 6s
	2h 28m 25s

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