print logging message in lcb_confmon_prepare()
print logging message in lcb_confmon_prepare()

In some situations this function may be called multiple times in
succession (such as when enabling/disabling various providers). Print a
message separating the list of enabled and/or disabled providers.

Change-Id: I81a496521a97d408efb1af44e48aab61d8860324
Reviewed-on: http://review.couchbase.org/38765
Tested-by: Mark Nunberg <e7d42768707bf23038325b0b68d4b577e5f6064a@haskalah.org>
Reviewed-by: Brett Lawson <c8c4369773d7d7226e031f0c4af62e3f38a08510@gmail.com>

mnunberg/libcouchbase,signmotion/libcouchbase,mody/libcouchbase,couchbase/libcouchbase,couchbase/libcouchbase,signmotion/libcouchbase,avsej/libcouchbase,PureSwift/libcouchbase,avsej/libcouchbase,PureSwift/libcouchbase,mnunberg/libcouchbase,senthilkumaranb/libcouchbase,couchbase/libcouchbase,avsej/libcouchbase,couchbase/libcouchbase,signmotion/libcouchbase,kojiromike/libcouchbase,couchbase/libcouchbase,maxim-ky/libcouchbase,kojiromike/libcouchbase,signmotion/libcouchbase,couchbase/libcouchbase,mnunberg/libcouchbase,PureSwift/libcouchbase,avsej/libcouchbase,senthilkumaranb/libcouchbase,mody/libcouchbase,senthilkumaranb/libcouchbase,maxim-ky/libcouchbase,avsej/libcouchbase,mnunberg/libcouchbase,maxim-ky/libcouchbase,avsej/libcouchbase,kojiromike/libcouchbase,couchbase/libcouchbase,PureSwift/libcouchbase,mody/libcouchbase,mnunberg/libcouchbase,avsej/libcouchbase,maxim-ky/libcouchbase,senthilkumaranb/libcouchbase,mody/libcouchbase,kojiromike/libcouchbase