Usage:  dbtool [-c certprefix] [-k keyprefix] [-V certversion] [-v keyversion]
           [-d dbdir]
-d certdir           Directory with cert database (default is .)
-c certprefix        prefix for the cert database (default is "")
-k keyprefix         prefix for the key database (default is "")
-V certversion       version of the cert database (default is 9)
-v keyversion        version of the key database (default is 4)