Split advanced configuration into sections

OME-DCO-1.1-Signed-off-by: Sebastien Besson <seb.besson@gmail.com> (github: sbesson)
Rename dn-configuration section

OME-DCO-1.1-Signed-off-by: Sebastien Besson <seb.besson@gmail.com> (github: sbesson)
List advanced configuration sections in the main page

OME-DCO-1.1-Signed-off-by: Sebastien Besson <seb.besson@gmail.com> (github: sbesson)
Move all configuration properties to a standalone page with glossaries

OME-DCO-1.1-Signed-off-by: Sebastien Besson <seb.besson@gmail.com> (github: sbesson)
Reorganize sever-advanced-configuration and config pages

OME-DCO-1.1-Signed-off-by: Sebastien Besson <seb.besson@gmail.com> (github: sbesson)
Redirect pages to the new config page

OME-DCO-1.1-Signed-off-by: Sebastien Besson <seb.besson@gmail.com> (github: sbesson)
Migrate LDAP properties to config page

OME-DCO-1.1-Signed-off-by: Sebastien Besson <seb.besson@gmail.com> (github: sbesson)
Organize sections alphabetically and add references

OME-DCO-1.1-Signed-off-by: Sebastien Besson <seb.besson@gmail.com> (github: sbesson)
Move FS configuration to the Configuration section

OME-DCO-1.1-Signed-off-by: Sebastien Besson <seb.besson@gmail.com> (github: sbesson)
Add a reference to the glossary in search section

OME-DCO-1.1-Signed-off-by: Sebastien Besson <seb.besson@gmail.com> (github: sbesson)
Move configuration properties glossary at the end of the section
Merge remote-tracking branch 'origin/dev_5_0' into omero_properties
Merge pull request #863 from sbesson/omero_properties

OMERO.server properties: documentation template
Slightly expanded re-indexing intro
New CLI reindex commands
Clarify *when* to re-index
Migrate troubleshooting text to search.txt
Add note about fewer results during indexing
Fix indent in bullets
Clarify that FileAnnotations are not under 'annotation:'