Implemented a safer version of stripslashes called stripslashes_safe.

Implemented a safer version of stripslashes called stripslashes_safe.

This will only fix these three cases:

  \'
  \"
  \\

and leaves all other backslashes alone.  Should fix problems in forums
and forms where backslashes were sometimes disappearing from windows
paths like C:\temp - usually only in the richtext editor, but still.