X Switch to ZODB5 with protocol=1 by default

component/ZODB/buildout.cfg

@@ -18,7 +18,7 @@ parts = ZODB/scripts
 # By default ZODB4 is used.
 [ZODB]
 recipe = slapos.recipe.build
-major  = 4
+major  = 5
 init =
   # link/depend ZODB -> ZODB<X>
   zodb_x = 'ZODB'+options['major']
@@ -57,10 +57,19 @@ egg-versions =
 
 [ZODB5]
 <= _ZODB
+recipe = zc.recipe.egg:develop
+setup = ${ZODB5-repository:location}
 egg-versions =
   ZODB = 5.6.0
   transaction = 2.4.0
 
+[ZODB5-repository]
+recipe  = slapos.recipe.build:gitclone
+repository = https://lab.nexedi.com/kirr/ZODB.git
+git-executable = ${git:location}/bin/git
+branch = y/ZODB5-protocol1
+revision = 5.6.0-49-gee8142342
+location = ${buildout:parts-directory}/ZODB5
 
 # ZODB4-wc2 is ZODB4 version with patches for wendelin.core 2 to work correctly.
 # The main change is backport of the way MVCC is handled by always calling