Remove some unnecessary recursive includes from the internal apps.h header,

and include bn.h in those C files that need bignum functionality.

apps/apps.c

@@ -126,6 +126,7 @@
 #include <openssl/engine.h>
 #endif
 #include <openssl/rsa.h>
+#include <openssl/bn.h>
 
 #define NON_MAIN
 #include "apps.h"

apps/apps.h

@@ -114,9 +114,7 @@
 
 #include "e_os.h"
 
-#include <openssl/buffer.h>
 #include <openssl/bio.h>
-#include <openssl/crypto.h>
 #include <openssl/x509.h>
 #include <openssl/lhash.h>
 #include <openssl/conf.h>

apps/dsa.c

@@ -68,6 +68,7 @@
 #include <openssl/evp.h>
 #include <openssl/x509.h>
 #include <openssl/pem.h>
+#include <openssl/bn.h>
 
 #undef PROG
 #define PROG	dsa_main

apps/ocsp.c

@@ -64,6 +64,7 @@
 #include <openssl/ocsp.h>
 #include <openssl/err.h>
 #include <openssl/ssl.h>
+#include <openssl/bn.h>
 
 /* Maximum leeway in validity period: default 5 minutes */
 #define MAX_VALIDITY_PERIOD	(5 * 60)

apps/rsa.c

@@ -68,6 +68,7 @@
 #include <openssl/evp.h>
 #include <openssl/x509.h>
 #include <openssl/pem.h>
+#include <openssl/bn.h>
 
 #undef PROG
 #define PROG	rsa_main

apps/speed.c

@@ -157,6 +157,7 @@
 #include <sys/param.h>
 #endif
 
+#include <openssl/bn.h>
 #ifndef OPENSSL_NO_DES
 #include <openssl/des.h>
 #endif

apps/version.c

@@ -115,6 +115,7 @@
 #include "apps.h"
 #include <openssl/evp.h>
 #include <openssl/crypto.h>
+#include <openssl/bn.h>
 #ifndef OPENSSL_NO_MD2
 # include <openssl/md2.h>
 #endif