mapserver/mapserver — pull request #4373 by faegi (2012-07-04 11:49:39+00:00)
Title: support for alternative worldfiles

In rare cases, it is required to use a separate worldfile which is not located next to the raster dataset, e.g. a read-only file share with not georeferenced raster data. Additionally to the EXTENT_PRIORITY processing instruction, this request adds a WORLDFILE processing instruction. This may be a file location or a path only (in this case the basename of the dataset will be appended).

Example:
```
PROCESSING "EXTENT_PRIORITY=WORLD"
PROCESSING "WORLDFILE=/path/" # or
PROCESSING "WORLDFILE=/path/file.wld"
```

fixes #2807