extend APPSODY_IGNORE_DIRS to also include files

[kewegner]

Currently the APPSODY_IGNORE_DIRS allows specifying the full path to a file, but the name of the variable, and documentation does not state this.

[kewegner]

I think the question here is should we rename (via deprecation) the environment variable to APPSODY_IGNORE_PATHS @neeraj-laad do you have an opinion?

[kewegner]

I think what we need to do is something like this:

1. Document the new variable APPSODY_IGNORE_PATHS

//tmpWATCHIGNOREDIR is set first

appsodyIgnorePaths = os.Getenv("APPSODY_IGNORE_PATHS")
if appsodyIgnorePaths != "" {
tmpWATCHIGNOREDIR=appsodyIgnorePaths
}

So if both are available appsodyIgnorePaths wins.