Invalid escape sequences should not be treated as an escape

[StephenWakely]

Looking at the RFC for Syslog it says:

A backslash ('') followed by none of the three described characters
is considered an invalid escape sequence. In this case, the
backslash MUST be treated as a regular backslash and the following
character as a regular character. Thus, the invalid sequence MUST
not be altered.

Which we are not doing.