Deprecate undocumented SSL_cache_hit().

Deprecate undocumented SSL_cache_hit(). Make SSL_session_reused() into a
real function.

Reviewed-by: Richard Levitte <levitte@openssl.org>

apps/s_client.c

diff --git a/apps/s_client.c b/apps/s_client.c
index d6797f5..39e3e48 100644
--- a/apps/s_client.c
+++ b/apps/s_client.c
@@ -2537,7 +2537,7 @@
     if (SSL_get_verify_result(s) == X509_V_OK &&
         (peername = SSL_get0_peername(s)) != NULL)
         BIO_printf(bio, "Verified peername: %s\n", peername);
-    BIO_printf(bio, (SSL_cache_hit(s) ? "---\nReused, " : "---\nNew, "));
+    BIO_printf(bio, (SSL_session_reused(s) ? "---\nReused, " : "---\nNew, "));
     c = SSL_get_current_cipher(s);
     BIO_printf(bio, "%s, Cipher is %s\n",
                SSL_CIPHER_get_version(c), SSL_CIPHER_get_name(c));

apps/s_server.c

diff --git a/apps/s_server.c b/apps/s_server.c
index 45e9227..f07c8f6 100644
--- a/apps/s_server.c
+++ b/apps/s_server.c
@@ -2612,7 +2612,7 @@
                        srtp_profile->name);
     }
 #endif
-    if (SSL_cache_hit(con))
+    if (SSL_session_reused(con))
         BIO_printf(bio_s_out, "Reused session-id\n");
     BIO_printf(bio_s_out, "Secure Renegotiation IS%s supported\n",
                SSL_get_secure_renegotiation_support(con) ? "" : " NOT");
@@ -2882,7 +2882,7 @@
 #ifndef OPENSSL_NO_EC
             ssl_print_curves(io, con, 0);
 #endif
-            BIO_printf(io, (SSL_cache_hit(con)
+            BIO_printf(io, (SSL_session_reused(con)
                             ? "---\nReused, " : "---\nNew, "));
             c = SSL_get_current_cipher(con);
             BIO_printf(io, "%s, Cipher is %s\n",