dir-merge in a subdirectory

[Matt McCutchen]

On Tue, 2008-08-05 at 15:26 +0100, Eduardo Suárez wrote:
> Is it possible to add a rule like
> 
> dir-merge myconf/mybackuprules
> 
> ?
> 
> That is, the file to merge is in a subdirectory of directory where we 
> want the rules to apply.

Rsync doesn't currently support that, but it would be a very reasonable
addition.  After the change, a dir-merge path beginning with / or ../
would request a scan of parent directories, while any other dir-merge
path would be saved as-is and followed from each directory to obtain
rules for that directory.

It looks like the place to implement this is in parse_merge_name in
exclude.c.  Simply changing the "if (fn != buf)" to also test for an
initial "../" makes the "dir-merge myconf/mybackuprules" example work.
However, parse_merge_name is called in three places, and the change
might break other uses.

Matt
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