
It's supported to print "interesting" config key-value paire to tr2 log by setting "GIT_TRACE2_CONFIG_PARAMS" environment variable and the "trace2.configparam" config, let's add the related docs in Documentaion/technical/api-trace2.txt. Signed-off-by: Teng Long <dyroneteng@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>