Fix for bug #1898804 "monetdb destroy" does not remove sql log
Fix for bug #1898804
"monetdb destroy" does not remove sql log

A stupid typo made monetdb destroy in -f mode try to remove a directory
"-f"...

zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb