Add commandline flag to not delete the prefixlist first

[crami]

I call bgpq4 twice once for normal filtering and one with -r 32 -R 32 for black holing, I use the same object name. It would be nice if on the second call i could suppress the "no ...."

Example:
bgpq4 -S $sources -A -4 -R {maxlen4} -l {name4} {object}
bgpq4 -S $sources -4 -r 32 -R 32 -l {name4} {object}

[job]

what about using fgrep?

bgpq4 .... -l {name4} | fgrep -v "no ip prefix-list {name4}"