When the Executor rejects an execute request for a client runner,
we summarily close the client socket to avoid a temporary resource
leak.

Needed some missing classes from logback master.

Not sure if the original author prefers the wildcard import...

SSLSocketRemote has an 'ssl' property of type SSLConfiguration.

SocketRemote is a component that connects to a remote
ServerSocketAppender and logs received events according to local
configuration.

Allows it to be reused for consistency in SocketRemote.

This class reimplements the much of the reconnect logic of the existing
SocketAppenderBase but does so by exposing an API that is easy to
integrate in a class that needs to handle automatic outbound connection
re-establishment, and in a way that is more easily tested.  This should
be adopted into SocketAppenderBase after some operational experience is
gained with it.

Dealing with IOException on Socket.close in each finally where it
appears is a pain...

LOGBACK-824: add ServerSocketAppender classes to access

SSLServerSocketAppender has an 'ssl' property of type SSLConfiguration.

LOGBACK-823: add ServerSocketAppender classes to classic

SSLServerSocketAppender has an "ssl" property of type SSLConfiguration.

Duh.

Duh.

LOGBACK-822: add ServerSocketAppenderBase and SSLServerSocketAppenderBase to core

These classes are all part of the implementation and should not be
visible outside of the package.

The ObjectInputStream reference (oos) was being closed without checking
to see if it was ever created.  If the ObjectInputStream constructor
happened to throw an exception, we'd have an NPE here.  Not likely, but
worth handling properly.