include sys/uio.h to get declaration of writev() (#72)

Closes: #71
Signed-off-by: Igor Gnatenko <ignatenkobrain@fedoraproject.org>

Author: Igor Gnatenko

src/canbd.c

@@ -9,6 +9,7 @@
 #include <sys/socket.h>
 #include <sys/stat.h>
 #include <sys/un.h>
+#include <sys/uio.h>
 #include <sys/wait.h>
 #include <unistd.h>