first shot at global variables (without proper sync so far)
Added check if mainqueue cfg ptr is NULL in glblDestructMainqCnfObj function (glbl.c)
fix: global&local variables could not be accessed via RainerScript

also, global variable pool did receive extra variables that did not
belong to global pool (problem in last milestone commit)
add proper sync to global variables
doc: add global variables
Fixed bugid #464 in elasticsearch output module

Added some libcurl options in checkConn to disable the bodyport of the
request within this functions. Otherwise libcurl could have created a
sigsegv when curl_easy_perform() was called.
Merge branch 'master-globalvars'