persistent-nodemap: also exchange the nodemap data over the wire

It appears that 2 bytes are never equals to 3 bytes.

Differential Revision: https://phab.mercurial-scm.org/D9810

mercurial/store.py

@@ -389,7 +389,11 b' def _calcmode(vfs):'
 
 
 def isrevlog(f, kind, st):
-    return kind == stat.S_IFREG and f[-2:] in (b'.i', b'.d', b'.n', b'.nd')
+    if kind != stat.S_IFREG:
+        return False
+    if f[-2:] in (b'.i', b'.d', b'.n'):
+        return True
+    return f[-3:] == b'.nd'
 
 
 class basicstore(object):

tests/test-persistent-nodemap.t

@@ -708,9 +708,11 b' The persistent nodemap should exist afte'
   adding [s] 00manifest.n (70 bytes)
   adding [s] 00manifest.i (313 KB)
   adding [s] 00manifest.d (452 KB)
+  adding [s] 00manifest-*.nd (118 KB) (glob)
   adding [s] 00changelog.n (70 bytes)
   adding [s] 00changelog.i (313 KB)
   adding [s] 00changelog.d (360 KB)
+  adding [s] 00changelog-*.nd (118 KB) (glob)
   $ ls -1 stream-clone/.hg/store/ | egrep '00(changelog|manifest)(\.n|-.*\.nd)'
   00changelog-*.nd (glob)
   00changelog.n