[portupgrade] pkgdb -L

[Patrick Lamaizière]

Hello,

I'm asking about the goal of the new option -L of pkgdb :
 -L --fix-lost Check and restore lost dependencies against the ports tree.

What is a lost dependency ?

# pkgdb -L
Look for lost dependencies:
ImageMagick-6.3.2.0: found
  print/ghostscript-afpl
-> Fixed.
ORBit2-2.14.6: ok
[...]

But i use ghostscript-gnu-7.07_15

So :
# pkgdb -F
--->  Checking the package registry database
Stale dependency: ImageMagick-6.3.2.0 -> ghostscript-afpl-8.54,1 
(print/ghostscript-afpl):
ghostscript-gnu-7.07_15 (score:70%) ? ([y]es/[n]o/[a]ll) [a]

And then i've got the same lost dependency again.

I do not understand the goal and the utility of this option -L, a sample ?

Thanks, regards.