fixes #2639 After creating user with empty e-mail it becomes impossible to add it.

fixes #2334 - location matcher doesn't match on smart parameters

fixes #2660 - settings, improve tests and fixes

- added string settings type
- fixed tests previously commented out due to CI failures
- more tests for core settings functionality
- parsing of string values enhanced and extracted to a separate method
- setting value to nil when it equals default is back...

fixes #2631 - fix remote code execution via controller name (CVE-2013-2121)

fixes #2630 - restrict assignment of roles to those a user has (CVE-2013-2113)

Fixes #2038 - updated config and partition table templates using ones from the community repository

Fixes #2615 - failed to save host group

If there was current organization selected, organizations got doubled
which prevented save. Fixed and added test for this part.

fixes #2386 - permission failure on create_lookup_value

fixes #2285 - subnet validation - length of addresses, strip whitespace and fix common typos

fixes #2602 - scoped_search error when using postgresql