Implemented merge_bodylimitaction_value() for BodyLimitAction
Implemented merge_bodylimitaction_value() for BodyLimitAction

This change makes the following directives to be merged properly:

SecRequestBodyLimitAction
SecResponseBodyLimitAction

SpiderLabs/ModSecurity,SpiderLabs/ModSecurity,SpiderLabs/ModSecurity,defanator/ModSecurity,defanator/ModSecurity,defanator/ModSecurity