BUILD: ssl: fix build on OpenSSL 1.0.0

After the code was ported to support 1.1.0, this one broke on 1.0.0 :

  src/shctx.c:406: undefined reference to `SSL_SESSION_set1_id_context'

The function was indeed introduced only in 1.0.1. The build was validated
with 0.9.8, 1.0.0, 1.0.1, 1.0.2 and 1.1.0.

This fix must be backported to 1.7.
diff --git a/include/proto/openssl-compat.h b/include/proto/openssl-compat.h
index 645c9b7..e2154f7 100644
--- a/include/proto/openssl-compat.h
+++ b/include/proto/openssl-compat.h
@@ -56,16 +56,7 @@
 
 
 #if (OPENSSL_VERSION_NUMBER < 0x1000000fL)
-/*
- * Functions introduced in OpenSSL 1.0.1
- */
-static inline int SSL_SESSION_set1_id_context(SSL_SESSION *s, const unsigned char *sid_ctx, unsigned int sid_ctx_len)
-{
-	s->sid_ctx_length = sid_ctx_len;
-	memcpy(s->sid_ctx, sid_ctx, sid_ctx_len);
-	return 1;
-}
-
+/* Functions introduced in OpenSSL 1.0.0 */
 static inline int EVP_PKEY_base_id(const EVP_PKEY *pkey)
 {
 	return EVP_PKEY_type(pkey->type);
@@ -86,6 +77,18 @@
 
 #endif
 
+#if (OPENSSL_VERSION_NUMBER < 0x1000100fL)
+/*
+ * Functions introduced in OpenSSL 1.0.1
+ */
+static inline int SSL_SESSION_set1_id_context(SSL_SESSION *s, const unsigned char *sid_ctx, unsigned int sid_ctx_len)
+{
+	s->sid_ctx_length = sid_ctx_len;
+	memcpy(s->sid_ctx, sid_ctx, sid_ctx_len);
+	return 1;
+}
+#endif
+
 #if (OPENSSL_VERSION_NUMBER < 0x1010000fL) || defined(LIBRESSL_VERSION_NUMBER)
 /*
  * Functions introduced in OpenSSL 1.1.0 and not yet present in LibreSSL