Good examples of not deleting custom config files/installing new config files

[Freddie Cash]

Could someone point me to some ports that do a good job of not
deleting custom config files when you do updates?  I'd like to
incorporate something similar into my ports.  Currently, I just
install everything with a .sample and put a note in the pkg-message. 
Which works great for upgrades, but not for the initial install.  And
as my ports go into the "multiple-dozens of config files in multipls
sub-directory" area, it's getting to be a pain for the users to copy
files around.

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Freddie Cash
fcash at ocis.net