some of the counters were defined as int (32 bit) vs. intctr_t (64 bit).
On some platforms "long" seems to be 64bit, and getrusage() provides
what we store as int via long. So this caused truncation and/or overflow.
This had undefined effects. Most often, everything worked fine
for values smaller than 2^31 but sometimes we got negative values.
closes https://github.com/rsyslog/rsyslog/issues/1517
48c248d626