Add support for relative path for nested include

[loicgasser]

Not sure what you tried to accomplish with cwd, append absolute paths?

According to me in mapfile you have either

• relative paths
• absolute paths

It seems that it was overriden every time when calling parse_file, which is not something I'd expect and I couldn't find any test for cwd argument.

Hope that you are happy with these changes.

In the utils section I added all the options you can give the parser (namely add_linebreaks for loads and expand_includes + add_linebreaks for load)

DOC:
http://mapserver.org/mapfile/include.html

Supported in versions 4.10 and higher.

The name of the file to be included MUST be quoted (single or double quotes).

Includes may be nested, up to 5 deep.

File location can be given as a full path to the file, or (in MapServer >= 4.10.1) as a path relative to the mapfile.

[geographika]

@loicgasser - I'll need to get some time to review this in more detail. Thanks for the comments and pull request. From memory I was using the cwd parameter so that I could load a mapfile from a string with relative includes, and load these from disk.

[loicgasser]

ok thanks, I can adapt/change it if you guide me.

[loicgasser]

main issue was that. always the same cwd which was overriden here

[loicgasser]

and as a result this would not follow relative nested paths.

[geographika]

@loicgasser - thanks for this. Merged. I increased the line length for flake8 as the default of 80 is quite low.