Merge remote-tracking branch 'origin/2.3-gae'

Conflicts:
	src/main/java/freemarker/core/DebugBreak.java
	src/main/java/freemarker/core/Environment.java
	src/main/java/freemarker/core/Expression.java
	src/main/java/freemarker/core/IfBlock.java
	src/main/java/freemarker/core/Macro.java
	src/main/java/freemarker/core/TemplateObject.java
	src/main/java/freemarker/core/ThreadInterruptionSupportTemplatePostProcessor.java
	src/main/java/freemarker/core/UnifiedCall.java
	src/main/javacc/FTL.jj