Allow a path to be specified for the chansrv log file #2263

Job	Run time
code formatting check	16s
min features with gcc	2m 44s
cppcheck	3m 50s
min features with g++	3m 26s
min features with clang	2m 53s
max features with gcc	3m 58s
max features with g++	2m 55s
max features with clang	4m 22s
max features with clang and AddressSanitized	3m 35s
max features with gcc and DEBUG	3m 12s
max features with gcc for 32-bit arch (legacy OS)	1m 35s
max features with g++ for 32-bit arch (legacy OS)	1m 31s
max features with clang for 32-bit arch (legacy OS)	2m 7s
	36m 24s

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