[FIX] IntelliJ IDEA config
[MIN] Optimizations triggered by IntelliJ inspections
Merge branch 'stable' of github.com:BaseXdb/basex

Conflicts:
	basex-core/src/main/java/org/basex/query/func/FNFile.java
	basex-core/src/main/java/org/basex/query/util/crypto/DigitalSignature.java