SharedConf into API specific modules.
- creation of a thread_share function sharing or not variables (in MP2)
- move apache module requirements to ApacheMP2
- move variables thread sharing to ApacheMP2
- creation of a webserverCodes tag for importing HTTP response codes
(references #630)
- deleting old MyHandler*, because they are not used anymore. (Specific handlers are called directly)
- renaming SpecificHandlers into Specific
- documentation updated accordingly in: 1.4/upgrades, 1.4/applications/zimbra, 1.4/applications/sympa, 1.4/securetoken
(references #630)