Migrate Syslog layouts and appender to use typed parameters in factories.

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/log4j2/trunk@1597395 13f79535-47bb-0310-9956-ffa450edef68
Add Protocol enum to type converters.

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/log4j2/trunk@1597396 13f79535-47bb-0310-9956-ffa450edef68
Convert javadoc to use actual table.

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/log4j2/trunk@1597397 13f79535-47bb-0310-9956-ffa450edef68
Re-use EnglishEnums.valueOf.

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/log4j2/trunk@1597398 13f79535-47bb-0310-9956-ffa450edef68
Add noinspection for escape of this during constructor.

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/log4j2/trunk@1597399 13f79535-47bb-0310-9956-ffa450edef68