[FIX] WebDAV: only close open session
Merge branch 'stable'
[MOD] Parsing: support for .tar.gz suffix"
Merge branch 'stable'

Conflicts:
	basex-core/src/main/java/org/basex/build/DirParser.java
[MIN] XQuery: function signatures revised
Merge branch 'stable'
[MOD] HTTP: Unified processing of HTTP (query/form field) parameters.
Merge branch 'stable'

Conflicts:
	basex-api/src/main/java/org/basex/http/restxq/RestXqFunction.java
[FIX] Better error messages: #922
Merge branch 'stable'
[FIX] WebDAV: fixed authentication and authorization; fixed formatting; code clean-up