SERVER-7454 add syslogFacility flag to specify syslog facility

Conflicts:
	src/mongo/db/server_options.cpp
	src/mongo/db/server_options.h
SERVER-7454 skip syslogFacility parsing on windows

Conflicts:
	src/mongo/db/server_options.cpp
SERVER-12887: change order of syslog options in help

Signed-off-by: Matt Kangas <matt.kangas@mongodb.com>
SERVER=11160 added compatibility syslog symbols under solaris

Conflicts:
	src/mongo/db/server_options.cpp
SERVER-11160 detect missing facilitynames in platform agnostic manner

Conflicts:
	src/mongo/db/server_options.cpp
SERVER-11160 improved comments describing missing syslog.h facility names

Conflicts:
	src/mongo/db/server_options.cpp