Fix #185: add devmon support, <dev/foo> condition provider

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

src/cond.h

@@ -6,11 +6,13 @@
 #include "svc.h"
 
 #define COND_BASE      "finit/cond"
+#define COND_DEV       "dev/"
 #define COND_PID       "pid/"
 #define COND_SYS       "sys/"
 #define COND_USR       "usr/"
 
 #define _PATH_COND     _PATH_VARRUN COND_BASE "/"
+#define _PATH_CONDDEV  _PATH_COND   COND_DEV
 #define _PATH_CONDPID  _PATH_COND   COND_PID
 #define _PATH_CONDSYS  _PATH_COND   COND_SYS
 #define _PATH_CONDUSR  _PATH_COND   COND_USR