statd: minor, cleanup, license headers

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

src/statd/Makefile

@@ -1,4 +1,5 @@
 CFLAGS   += -Wall -Wextra -Werror
+CPPFLAGS += -D_GNU_SOURCE
 LDLIBS   += -lsysrepo -lev -lyang -ljansson -lite -lsrx
 
 TARGET    = statd

src/statd/shared.c

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <jansson.h>

src/statd/shared.h

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
+
 #ifndef STATD_SHARED_H_
 #define STATD_SHARED_H_
 

src/statd/statd.c

@@ -1,4 +1,3 @@
-#define _GNU_SOURCE
 /* SPDX-License-Identifier: BSD-3-Clause */
 
 #include <stdio.h>