Merge branch 'docs-disable_nfs_delegation' into 'master'

Recommend disabling NFS server delegation

See merge request gitlab-org/gitlab-ce!26668

doc/administration/high_availability/nfs.md

@@ -71,9 +71,8 @@ bug](https://bugzilla.redhat.com/show_bug.cgi?id=1552203) that may be fixed in
 [more recent kernels with this
 commit](https://github.com/torvalds/linux/commit/95da1b3a5aded124dd1bda1e3cdb876184813140).
 
-Users encountering a similar issue may be advised to disable the NFS server
-delegation feature, which is an optimization to reduce the number of network
-round-trips needed to read or write files. To disable NFS server delegations
+GitLab recommends all NFS users disable the NFS server
+delegation feature. To disable NFS server delegations
 on an Linux NFS server, do the following:
 
 1. On the NFS server, run: