* gnu/packages/sync.scm (owncloud-client): Update to 2.5.1.10973. * gnu/packages/patches/owncloud-disable-updatecheck.patch: Update patch.
* gnu/packages/sync.scm (owncloud-client)[source]: Add patch. * gnu/packages/patches/owncloud-disable-updatecheck.patch: New file. * gnu/local.mk (dist_patch_DATA): Register it.