software/postgresql: Don't build postgresql twice

component/postgresql/buildout.cfg defines both postgresql92 and
postgresql sections, with postgresql being just

    [postgresql]
    <= postgresql92

On the other hand, software/postgresql uses postgresql92 in parts, but
bin = ${postgresql:location}/bin in instance, which leads to _both_
postgresql and postgresql92 being built, and postgresql92 not used at all.

Let's fix it and use postgresql92 everywhere.

/cc @kazuhiko

software/postgres/instance.cfg.in

@@ -43,7 +43,7 @@ port = 5432
 dbname = db
 # pgdata_directory is created by initdb, and should not exist beforehand.
 pgdata-directory = $${directories:var}/data
-bin = ${postgresql:location}/bin
+bin = ${postgresql92:location}/bin
 services = $${directories:services}
 
 

software/postgres/software.cfg

@@ -17,7 +17,7 @@ parts =
 recipe = slapos.recipe.template
 url = ${:_profile_base_location_}/instance.cfg.in
 output = ${buildout:directory}/instance.cfg
-md5sum = d8b833a2054b82b6031a9420008b58fd
+md5sum = 9c3ff5e5c326e12c23ba56039b76eb8a
 mode = 0644
 
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