Scan list of IDs with scan_identifiers

[rumpelsepp]

scan_identifiers scans a defined range. Sometimes scanning a specific range/list is helpful.

This proposes a --id option for scan_identifers.:

def scan(ids):
    for ID in ids:
        do_scan(ID)

def main(args):
    if args.ids:
        scan(args.ids)
    else:
        scan(range(args.start, args.end)