package/collectd: add 'synproxy' option

The synproxy plugin exists since 5.8.0 and is enabled by default in
collectd.

Add an option in Buildroot, disabled by default.

Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/collectd/Config.in

@@ -513,6 +513,11 @@ config BR2_PACKAGE_COLLECTD_SWAP
 	help
 	  Collects the amount of memory currently written to disk.
 
+config BR2_PACKAGE_COLLECTD_SYNPROXY
+	bool "synproxy"
+	help
+	  Synproxy stats plugin.
+
 config BR2_PACKAGE_COLLECTD_TABLE
 	bool "table"
 	help

package/collectd/collectd.mk

@@ -132,6 +132,7 @@ COLLECTD_CONF_OPTS += \
 	$(if $(BR2_PACKAGE_COLLECTD_SMART),--enable-smart,--disable-smart) \
 	$(if $(BR2_PACKAGE_COLLECTD_SNMP),--enable-snmp,--disable-snmp) \
 	$(if $(BR2_PACKAGE_COLLECTD_SWAP),--enable-swap,--disable-swap) \
+	$(if $(BR2_PACKAGE_COLLECTD_SYNPROXY),--enable-synproxy,--disable-synproxy) \
 	$(if $(BR2_PACKAGE_COLLECTD_SYSLOG),--enable-syslog,--disable-syslog) \
 	$(if $(BR2_PACKAGE_COLLECTD_TABLE),--enable-table,--disable-table) \
 	$(if $(BR2_PACKAGE_COLLECTD_TAIL),--enable-tail,--disable-tail) \