lib/zodb: Drop client-only parameters from normalized NEO URI

In NEO/go we changed the NEO URI scheme, so that client-only options
reside in the fragment part of the URI [1]. This means that we should
drop the complete fragment part within normalization in order to ensure
wendelin.core correctly recognizes two different URI pointing to the
same storage.

This hasn't been done in nexedi/wendelin.core!17, because
nexedi/neoppod!18 was still unresolved.

[1] kirr/neo@4c9414ea

lib/tests/test_zodb.py

@@ -557,6 +557,8 @@ def test_zstor_2zurl(tmpdir, neo_ssl_dict):
         #   Different SSL paths
         ("neos://ca=a&key=b&cert=c@xyz:1/cluster", "neos://xyz:1/cluster"),
         ("neos://ca=α&key=β&cert=γ@xyz:1/cluster", "neos://xyz:1/cluster"),
+        #   Client parameters
+        ("neo://127.0.0.1:1234/cluster#compress=True", "neo://127.0.0.1:1234/cluster"),
     ],
 )
 def test_zurl_normalize_main(zurl, zurl_norm_ok):

lib/zodb.py

@@ -489,6 +489,9 @@ def _znormalize_neo(scheme, netloc, path, query, frag):
     # get the same mountpoint among different clients we explicitly
     # sort the master node addr order.
     netloc = ",".join(sorted(netloc.split(',')))
+    # Drop client-only options: they reside in the fragment part
+    # of the URI, see https://lab.nexedi.com/kirr/neo/commit/4c9414ea
+    frag = ""
     return (scheme, netloc, path, query, frag)
 _znormalizer('neo',  _znormalize_neo)
 _znormalizer('neos', _znormalize_neo)