HPCC-9956 Reduce pre_connect error msgs to log files

Signed-off-by: Mark Kelly <mark.kelly@lexisnexis.com>
HPCC-9956 Dont print repeated pre_connect errors when err is ENETUNREACH

Signed-off-by: Mark Kelly <mark.kelly@lexisnexis.com>
HPCC-9956 Initialize err count properly

Signed-off-by: Mark Kelly <mark.kelly@lexisnexis.com>