Include "getopt.h" instead of <unistd.h>.

Rev: src/nettle/examples/rsa-decrypt.c:1.5
Rev: src/nettle/examples/rsa-encrypt.c:1.6
Rev: src/nettle/examples/rsa-keygen.c:1.13

examples/rsa-decrypt.c

@@ -32,9 +32,6 @@
 #include <stdio.h>
 #include <string.h>
 
-/* For getopt */
-#include <unistd.h>
-
 /* string.h must be included before gmp.h */
 #include "aes.h"
 #include "bignum.h"
@@ -48,6 +45,8 @@
 #include "io.h"
 #include "rsa-session.h"
 
+#include "getopt.h"
+
 void
 rsa_session_set_decrypt_key(struct rsa_session *ctx,
 			    const struct rsa_session_info *key)

examples/rsa-encrypt.c

@@ -32,9 +32,6 @@
 #include <stdio.h>
 #include <string.h>
 
-/* For getopt */
-#include <unistd.h>
-
 /* string.h must be included before gmp.h */
 #include "bignum.h"
 #include "buffer.h"
@@ -45,6 +42,8 @@
 #include "io.h"
 #include "rsa-session.h"
 
+#include "getopt.h"
+
 void
 rsa_session_set_encrypt_key(struct rsa_session *ctx,
 			    const struct rsa_session_info *key)

examples/rsa-keygen.c

@@ -32,9 +32,6 @@
 #include <stdio.h>
 #include <string.h>
 
-/* For getopt */
-#include <unistd.h>
-
 #include "buffer.h"
 #include "rsa.h"
 #include "sexp.h"
@@ -42,6 +39,8 @@
 
 #include "io.h"
 
+#include "getopt.h"
+
 #define KEYSIZE 900
 #define ESIZE 30