syslogd: make maximum message length configurable

Signed-off-by: Janne Kiviluoto <janne.kiviluoto@bluegiga.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/sysklogd/syslogd.c b/sysklogd/syslogd.c
index 3320369..6bc450b 100644
--- a/sysklogd/syslogd.c
+++ b/sysklogd/syslogd.c
@@ -46,7 +46,7 @@
 #undef SYSLOGD_WRLOCK
 
 enum {
-	MAX_READ = 256,
+	MAX_READ = CONFIG_FEATURE_SYSLOGD_READ_BUFFER_SIZE,
 	DNS_WAIT_SEC = 2 * 60,
 };