HTTP: fixed bug on returning response when accepts is */* like with curl
listDatabases may result databases names without first letter
listDatabases may result databases names without first letter 1.1
Added new test case for special characters
Fixed issue #1926
Fixed issue #1928
Merge pull request #1931 from kowalot/develop

list databases command may result with databases names without first letter
Merge branch 'develop' into rid-set-sbtree