python: put some defaults on suricata.config.defaults

This is a module that can contain installation default. For now
it includes the sysconfdir, and rules data directory for use
by suricata-update.

configure.ac

@@ -2266,7 +2266,7 @@ AC_SUBST(CONFIGURE_SYSCONDIR)
 AC_SUBST(CONFIGURE_LOCALSTATEDIR)
 AC_SUBST(PACKAGE_VERSION)
 
-AC_OUTPUT(Makefile src/Makefile rust/Makefile rust/Cargo.toml rust/.cargo/config qa/Makefile qa/coccinelle/Makefile rules/Makefile doc/Makefile doc/userguide/Makefile contrib/Makefile contrib/file_processor/Makefile contrib/file_processor/Action/Makefile contrib/file_processor/Processor/Makefile contrib/tile_pcie_logd/Makefile suricata.yaml etc/Makefile etc/suricata.logrotate etc/suricata.service python/Makefile python/bin/suricatasc ebpf/Makefile)
+AC_OUTPUT(Makefile src/Makefile rust/Makefile rust/Cargo.toml rust/.cargo/config qa/Makefile qa/coccinelle/Makefile rules/Makefile doc/Makefile doc/userguide/Makefile contrib/Makefile contrib/file_processor/Makefile contrib/file_processor/Action/Makefile contrib/file_processor/Processor/Makefile contrib/tile_pcie_logd/Makefile suricata.yaml etc/Makefile etc/suricata.logrotate etc/suricata.service python/Makefile python/suricata/config/defaults.py python/bin/suricatasc ebpf/Makefile)
 
 SURICATA_BUILD_CONF="Suricata Configuration:
   AF_PACKET support:                       ${enable_af_packet}

python/.gitignore

@@ -5,3 +5,5 @@ lib/
 scripts-*/
 bin/suricatasc
 !bin/suricatasc.in
+suricata/config/defaults.py
+!suricata/config/defaults.py.in

python/setup.py

@@ -28,6 +28,7 @@ setup(
     url='https://www.suricata-ids.org/',
     packages=[
         "suricata",
+        "suricata.config",
         "suricata.ctl",
         "suricata.sc",
         "suricatasc",

python/suricata/config/defaults.py.in

@@ -0,0 +1,2 @@
+sysconfdir = "@e_sysconfdir@"
+datarulesdir = "@e_datarulesdir@"