SASL section of svnserve.conf: generate conditionally or always?

Currently we generate the SASL section of svnserve.conf if and only if
SVN_HAS_SASL is set: that is, if "svnadmin" (at the time of running
"svnadmin create") is linked with SASL.

However, if the svnadmin used to create the repository and the
svnserve used to serve it come from different builds (perhaps because
the repository was created long before you considered serving it with
SASL), this choice could be wrong: the config file might say that SASL
will work when svnserve isn't actually built with it, or the config
file might not mention SASL at all even though you now have a
SASL-enabled svnserve.

Should we change the generated file to always talk about SASL but
direct the user to check the output of "svnserve --version" to see if
SASL authentication is available?

(Similar issues will hold for the generated fsfs.conf I'm about to add
on the in-memory-cache branch w.r.t. apr_memcache.)

--dave

-- 
David Glasser | glasser@davidglasser.net | http://www.davidglasser.net/
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