Update TCP proxy to address Coverity errors #2380

Job	Run time
code formatting check	22s
cppcheck	3m 47s
min features with gcc	2m 46s
min features with g++	2m 45s
min features with clang	2m 43s
max features with gcc	3m 53s
max features with g++	3m 33s
max features with clang	4m 48s
max features with clang and AddressSanitized	3m 40s
max features with gcc and DEBUG	3m 32s
max features with gcc for 32-bit arch (legacy OS)	1m 39s
max features with g++ for 32-bit arch (legacy OS)	1m 51s
max features with clang for 32-bit arch (legacy OS)	1m 36s
	36m 55s

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