Add ELsyslog class as destination option.
Add syslog destination option:

-  add new class ELsyslog that inherits from ELoutput
-  adjust ELadministrator with some C++11 semantics

-  add tools/syslog/ dir with rsyslog conf. example and sqlite3 router
Remove syslog option from mf statistics printout
Merge branch 'cdcvs/master'

Import latest changes from upstream which remove some code and
provide additional tools.