warn that in-place ln_s import can be slower

see https://trac.openmicroscopy.org.uk/ome/ticket/12217
spelling mistake
ldap over ssl instruction improvement
adjust for permitting no root-owned directories
merge dev_5_0 -D org: PR 778 (document new // separator in omero.fs.repo.path)
merge dev_5_0 -D org: PR 779 (Webstart template)
merge dev_5_0 -D org: PR 780 (warn that in-place ln_s can be slower for HCS)
merge dev_5_0 -D org: PR 781 (ldap over ssl instruction improvement)
merge dev_5_0 -D org

Repository: openmicroscopy/ome-documentation
Already up-to-date.

Merged PRs:
  # PR 778 mtbc 'document new // separator in omero.fs.repo.path'
  # PR 779 aleksandra-tarkowska 'Webstart template'
  # PR 780 mtbc 'warn that in-place ln_s can be slower for HCS'
  # PR 781 aleksandra-tarkowska 'ldap over ssl instruction improvement'

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