Prepare nwserv.conf/nw.ini template support for the upcoming NetWare salvage backend.
Add configuration entries for enabling salvage support and for selecting the recycle/salvage repository names. The default layout keeps deleted file payloads below .recycle and stores JSON metadata below .salvage.
This does not implement salvage handling yet. AFP 0x13 and the NCP salvage functions remain unsupported until the nwsalvage backend exists.
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