1) Corrected errors with relative paths that prevented sounds from

1) Corrected errors with relative paths that prevented sounds from
being played correctly for notification/test.
2) Removed local file option. As it existed,  it didn't function properly
on windows, possibly also not on Unix. This function should be revisited, ,
possibly changing to support a single uploaded sound (less than a certain
size) per user, which would live in the prefs dir (?). This allows users
to supply their own sound of choice that will work regardless of
which PC they're using, which is more the point of SquirrelMail anyway.

Didn't want to try to squeeze the change to upload in under 1.4, so I just
removed it entirely.

git-svn-id: https://svn.code.sf.net/p/squirrelmail/code/trunk/squirrelmail@4703 7612ce4b-ef26-0410-bec9-ea0150e637f0