Without doing so if the device includes a semicolon the following happens:
% ./scan -x 'brother4:bus7;dev1'
Scanning...
scanadf: open of device brother4:bus7 failed: Invalid argument
./scan: line 248: dev1: command not found
Found no scans.
Can't set multiple traps on the same signal -- ensure that when the
verbose option is set, the regular cleanup is done in addition to the
lockfile cleanup.
* Allow page size and crop to be set
* Add driver-based paper lower edge detection with crop
* Add overscan on page size to allow for cropping larger pages
* Do not default size to Letter if crop is specified
When scanning multiple pages, sometimes it is useful to write out
each page scanned to a separately named file.
The new --outputlist argument allows that mode of operation.
