Increase the high fee multiplier to keep same threshold.
Increase the high fee multiplier to keep same threshold.

When the minimum relay fee was modified from 0.01 to 0.001 DCR/kB this
value was not changed, causing the new high fee threshold to be 0.1
DCR/kB.  After discussion, we want to keep the same default high fee
threshold as before, especially as this value is used to limit
unintended high fees for ticket purchases.

decred/dcrd,jrick/dcrd,jcmincke/dcrd,jrick/btcd,jcmincke/dcrd,jcmincke/dcrd,jrick/btcd,jrick/btcd,jrick/dcrd,decred/dcrd