advertising compiled-but-not-instantiated overlays

[Aaron Richton <richton@nbcs.rutgers.edu>]

2.4.18 releases slapo-sssvlv. Now my servers are advertising 
VLV/sortKeyList as supportedControls. Thing is, I don't specify "overlay 
sssvlv" so they're not really "supported" in any meaningful way. Searches 
that specify the controls just error out fast. I'm not particularly 
inclined to enable the feature, but I'm not sure if somebody else might 
want it in their installation, so I'd prefer to keep it compiled in.


This is the case with all overlays across the board. For example, 
configure --enable-modules --enable-overlays=mod and syncprov isn't 
advertised in test000. But if you just ./configure and run test000, you 
see 1.3.6.1.4.1.4203.1.9.1.1 despite the fact that there's no way test000 
could provide LDAP Sync as configured. (Recall that --enable-syncprov 
defaults to yes.)

To me it's counterintuitive and "false advertising": unless there's an 
"overlay syncprov" in slapd.1.conf, I don't see why that should show up in 
test000. Thoughts?