Prepare for release.
Fixed: AdminEmail does not work / causes internal server error (bug#10287).
Fixed: mails with an empty return-path header must not trigger auto responses in OTRS (bug#10309).

Conflicts:
	CHANGES.md

Conflicts:
	CHANGES.md
Corrected CHANGES
Fixed: Incorrect handling of special characters in DynamicFields (bug#10361).

Conflicts:
	CHANGES.md
Fixed: OTRS does not protect against clickjacking (bug#10374).

Conflicts:
	CHANGES.md
	Kernel/Output/HTML/Standard/CustomerHeader.dtl
	Kernel/Output/HTML/Standard/CustomerHeaderSmall.dtl
	Kernel/Output/HTML/Standard/Header.dtl
	Kernel/Output/HTML/Standard/HeaderSmall.dtl
	Kernel/Output/HTML/Standard/Login.dtl
	Kernel/Output/HTML/Standard/PrintHeader.dtl

Conflicts:
	CHANGES.md
	Kernel/Output/HTML/Standard/CustomerHeaderSmall.dtl
	Kernel/Output/HTML/Standard/Login.dtl
Add executable bit to doc script.
Follow-up fix for bug#10361: Incorrect handling of special characters in DynamicFields.
Prepare for release.
Tidied.
Fixed incorrect relative time calculation for minute range.
Updated .gitignore file.
Fix IDs of elements in the config reference to avoid filename collisions on case insensitive file systems.

Conflicts:
	scripts/auto_build/xml2docbook.pl