Fix outdated link

previous link https://wiki.openssl.org/index.php/Manual:EVP_BytesToKey(3) has no detail

Author: yeoleobun

docs/doc/aead.md

@@ -19,7 +19,7 @@ The way Shadowsocks using AEAD ciphers is specified in [SIP004] and amended in [
 
 ## Key Derivation
 
-The master key can be input directly from user or generated from a password. The key derivation is still following EVP_BytesToKey(3) in OpenSSL. The detailed spec can be found [here](https://wiki.openssl.org/index.php/Manual:EVP_BytesToKey(3))
+The master key can be input directly from user or generated from a password. The key derivation is still following EVP_BytesToKey(3) in OpenSSL. The detailed spec can be found [here](https://docs.openssl.org/master/man3/EVP_BytesToKey/)
 
 [HKDF_SHA1] is a function that takes a secret key, a non-secret salt, an info string, and produces a subkey that is cryptographically strong even if the input secret key is weak.
 
@@ -81,4 +81,4 @@ The salt is used to derive the per-session subkey and must be generated randomly
 [@breakwa11]: https://github.com/breakwa11
 [@riobard]: https://github.com/riobard
 [@Noisyfox]: https://github.com/noisyfox
-[HKDF_SHA1]: https://tools.ietf.org/html/rfc5869
+[HKDF_SHA1]: https://tools.ietf.org/html/rfc5869