proftpd: add mod_redis support

The mod_redis module enables ProFTPD support for caching data in Redis
servers, using the hiredis client library. This is available since
proftpd-1.3.6rc5 and later.

Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/proftpd/Config.in

@@ -13,4 +13,11 @@ config BR2_PACKAGE_PROFTPD_MOD_REWRITE
 	help
 	  Compile ProFTPD with mod_rewrite support
 
+config BR2_PACKAGE_PROFTPD_MOD_REDIS
+	bool "mod_redis support"
+	select BR2_PACKAGE_HIREDIS
+	help
+	  The mod_redis module enables ProFTPD support for caching data in Redis
+	  servers, using the hiredis client library.
+
 endif

package/proftpd/proftpd.mk

@@ -27,6 +27,13 @@ ifeq ($(BR2_PACKAGE_PROFTPD_MOD_REWRITE),y)
 PROFTPD_CONF_OPTS += --with-modules=mod_rewrite
 endif
 
+ifeq ($(BR2_PACKAGE_PROFTPD_MOD_REDIS),y)
+PROFTPD_CONF_OPTS += --enable-redis
+PROFTPD_DEPENDENCIES += hiredis
+else
+PROFTPD_CONF_OPTS += --disable-redis
+endif
+
 # configure script doesn't handle detection of %llu format string
 # support for printing the file size when cross compiling, breaking
 # access for large files.