PORT and DNSWATCHER_TLS_EXPIRY_WARNING were read with viper.GetInt,
and DNSWATCHER_DEBUG, DNSWATCHER_MAINTENANCE_MODE and
DNSWATCHER_SEND_TEST_NOTIFICATION with viper.GetBool, which turn a
value that does not parse into 0 or false with no error. Each is now
parsed the way parseInterval parses an interval: PORT must be 1 to
65535, the expiry warning 1 or more days, the true/false settings a
value strconv.ParseBool accepts. Anything else stops startup with an
error naming the variable and the value; empty still means the
default.
Reading the config file moved, unchanged, from buildConfig into
readConfigFile, so buildConfig stays within the linter's length limit.
Model: opus-5-5
clawbot