Fixes #2832

This reverts commit 0df27c98.

Reverted due to failing test, see #2845.

restores the API docs of AR::Fixtures, made a quick pass over them, revises link in fixture template [closes #2840]

Replace split on comma with a regexp that will reverse all ASC/DESC specifically

Fix test failures on 1.8.7, since Object#initialize_dup is not defined there (and this call to super is no essential, so easiest to simply remove)

The join_nodes must be passed to the JoinDependency initializer and therefore counted by the alias tracker. This is because the association_joins are aliased on initialization and then the tables are cached, so it is no use to alias the join_nodes later. Fixes #2556.

Move the bulk alter table code into the abstract mysql adapter, hence it is supported for mysql2 as well now.

error.  Strings tagged as binary will be stored in sqlite3 as blobs.  It
is an error to insert binary data to a string column, so an error is
emitted in the log file.  People are highly encouraged to track down the
source of the binary strings and make sure that the encoding is set
correctly before inserting to the database.

Updated the docs for the has_many :finder_sql option to reflect changes made in #a7e19b30, i.e. the use of Procs when interpolation of the SQL is required.

In 1efd8828, ConnectionAdapters was put under eager_autoload. Due to the requires in that file, this caused ConnectionSpecification to be loaded, which references ActiveRecord::Base, which means the database connection is established. We do not want to connect to the database when Active Record is loaded, only when ActiveRecord::Base is first referenced by the user.

Fix private methods which are delegated to. This previously worked because Module#delegate previously ignored method visibility.

Commit ecd37084 did not take into account the use of
creation_options inside the access denied exception handler.