improve xs_handshake() diag message

The important part of the error message is that the binaries are
mismatched; the details of the handshake keys are an implementation
detail.

Or to put it another way, when someone mixes up their paths, getting
something like

    Fcntl.c: Invalid handshake key got 0xcf80000 needed 0xd700000, binaries are mismatched

Is a bit scary and confusing. This is hopefully (slightly) less scary:

    Fcntl.c: loadable library and perl binaries are mismatched (got handshake key 0xcf80000, needed 0xd700000)

1 files changed, 2 insertions, 2 deletions

diff --git a/util.c b/util.c
index f7e1ccd249..3737a010e4 100644
--- a/util.c
+++ b/util.c
@@ -5425,8 +5425,8 @@ Perl_xs_handshake(const U32 key, void * v_my_perl, const char * file, ...)
     if(UNLIKELY(got != need)) {
 	bad_handshake:/* recycle branch and string from above */
 	if(got != (void *)HSf_NOCHK)
-	    noperl_die("%s: Invalid handshake key got %p"
-		" needed %p, binaries are mismatched",
+	    noperl_die("%s: loadable library and perl binaries are mismatched"
+                       " (got handshake key %p, needed %p)\n",
 		file, got, need);
     }