Deprecate SSL_library_init.

It just calls CRYPTO_library_init and doesn't do anything else. If
anything, I'd like to make CRYPTO_library_init completely go away too.
We have CRYPTO_once now, so I think it's safe to assume that, if ssl/
ever grows initialization needs beyond that of crypto/, we can hide it
behind a CRYPTO_once and not burden callers.

Change-Id: I63dc362e0e9e98deec5516f4620d1672151a91b6
Reviewed-on: https://boringssl-review.googlesource.com/6311
Reviewed-by: Adam Langley <alangley@gmail.com>
diff --git a/tool/tool.cc b/tool/tool.cc
index e4d5201..f67f0c7 100644
--- a/tool/tool.cc
+++ b/tool/tool.cc
@@ -15,6 +15,7 @@
 #include <string>
 #include <vector>
 
+#include <openssl/crypto.h>
 #include <openssl/err.h>
 #include <openssl/ssl.h>
 
@@ -109,7 +110,7 @@
   }
 #endif
 
-  SSL_library_init();
+  CRYPTO_library_init();
 
   int starting_arg = 1;
   tool_func_t tool = nullptr;