apache: improved fastScriptAlias

apache: improved fastScriptAlias

Implementation using Alias + <Location> proved unworkable -- Apache
has an obnoxious property wherein Aliases are first match and
Locations are last match, causing all sorts of exciting
side-effects (e.g. having to add a `<Location>SetHandler
None</Location>' afterward for any aliases that otherwise would have
matched).

A directory + file match however works and does not cause strange
alias behavior.

Also fix not stripping trailing `/' when setting up wrapper.