New define WITH_PUBLIC_KEY, and new configure flag

--disable-public-key. Updated rsa-files to check for that, rather
than for HAVE_LIBGMP.

Rev: src/nettle/rsa-keygen.c:1.3
Rev: src/nettle/rsa.c:1.8
Rev: src/nettle/rsa2sexp.c:1.2
Rev: src/nettle/rsa_md5.c:1.5
Rev: src/nettle/rsa_sha1.c:1.5
Rev: src/nettle/sexp2rsa.c:1.3
Rev: src/nettle/testsuite/rsa-keygen-test.c:1.4
Rev: src/nettle/testsuite/rsa-test.c:1.5
Rev: src/nettle/testsuite/rsa2sexp-test.c:1.2
Rev: src/nettle/testsuite/sexp2rsa-test.c:1.2
Rev: src/nettle/testsuite/testutils.c:1.13
Rev: src/nettle/testsuite/testutils.h:1.11

1 files changed, 2 insertions, 2 deletions

diff --git a/rsa2sexp.c b/rsa2sexp.c
index 9a087cae..eb6f7e89 100644
--- a/rsa2sexp.c
+++ b/rsa2sexp.c
@@ -26,7 +26,7 @@
 #include "config.h"
 #endif
 
-#if HAVE_LIBGMP
+#if WITH_PUBLIC_KEY
 
 #include "rsa.h"
 
@@ -49,4 +49,4 @@ rsa_keypair_to_sexp(struct nettle_buffer *buffer,
 		       "public-key", "rsa", "n", pub->n, "e", pub->e);
 }
 
-#endif /* HAVE_LIBGMP */
+#endif /* WITH_PUBLIC_KEY */