added echelon su3 reseed cert
checkremotecerts.sh: fix regex so that commented out hosts are not matched

(//" was needed and  // " would pass through)
temporarily disable reseed.pkol.de:443 (ticket #1326)
merge of '2542a527f53e4df3896ae26f5b0cf7d0a45128ff'
     and '4944f31a9bec7dcacd3a97f6e451fd4eaf5f4096'