refactor libcrypto initialisation

Don't call OpenSSL_add_all_algorithms() unless OpenSSL actually
supports it.

Move all libcrypto initialisation to a single function, and call that
from seed_rng() that is called early in each tool's main().

Prompted by patch from Rosen Penev

1 files changed, 2 insertions, 0 deletions

diff --git a/sftp.c b/sftp.c
index ed95cf817..f886b330b 100644
--- a/sftp.c
+++ b/sftp.c
@@ -2367,6 +2367,8 @@ main(int argc, char **argv)
         sanitise_stdfd();
         msetlocale();
 
+        seed_rng();
+
         __progname = ssh_get_progname(argv[0]);
         memset(&args, '\0', sizeof(args));
         args.list = NULL;