libmysql: deprecate

pkgs/top-level/aliases.nix

@@ -95,6 +95,7 @@ mapAliases (rec {
   libcap_pam = if stdenv.isLinux then libcap.pam else null; # added 2016-04-29
   libcap_progs = libcap.out; # added 2016-04-29
   libjson_rpc_cpp = libjson-rpc-cpp; # added 2017-02-28
+  libmysql = mysql.connector-c; # added # 2017-12-28, this was a misnomer refering to libmysqlclient
   libtidy = html-tidy;  # added 2014-12-21
   links = links2; # added 2016-01-31
   lttngTools = lttng-tools;  # added 2014-07-31

pkgs/top-level/all-packages.nix

@@ -11992,7 +11992,6 @@ with pkgs;
   };
 
   mysql = mariadb;
-  libmysql = mysql.connector-c; # `libmysql` is a slight misnomer ATM
 
   mysql_jdbc = callPackage ../servers/sql/mysql/jdbc { };