syslog-ng: update to version 3.19.1

syslog-ng: update to version 3.19.1

Makefile
- Changed URL
- Added LICENSE, CPE ID, more dependencies, postint and prerm scripts
- Enabled by default JSON and HTTP (would be good to split them in future
to sub-packages); Disabled java-modules, tcp wrapper
- Re-ordered CONFIGURE_ARGS as they occur when executing
- Resorted section: define Package/syslog-ng/install

syslog-ng.conf
- include scl.conf
- have a more specific one than upstream (they have it really simple)
- document it

Patch:
remove the unnecessary one

Signed-off-by: Josef Schlehofer <pepe.schlehofer@gmail.com>