These functions are obsolete and a noop in OpenSSL 1.1.

diff -Naurp a/src/crypto.c b/src/crypto.c
--- a/src/crypto.c	2016-09-23 09:52:47.000000000 +0200
+++ b/src/crypto.c	2020-09-09 11:20:44.291423666 +0200
@@ -67,11 +67,6 @@ EXPORT_SYMBOL int cryptmount_init(void)
 			pthread_mutex_unlock(&ehd_init_lock);
 			return ret;
 		}
-#ifdef HAVE_LIBCRYPTO
-		OpenSSL_add_all_algorithms();
-		OpenSSL_add_all_ciphers();
-		OpenSSL_add_all_digests();
-#endif
 	}
 	++ehd_use_count;
 	pthread_mutex_unlock(&ehd_init_lock);