In commit 8ed03baa76 (gitattributes: prefer `eol=crlf` to `-crlf`,
2017-08-23) we left a few CRLF blobs in the repository. Some Git
versions get confused by text files with CRLF blobs. Convert them
to LF blobs. Use the `eol=crlf` attribute to tell Git to use CRLF
on checkout.
The `crlf` attribute is deprecated in Git. This also changes the given
files to be in the index using LF newlines, but they will be checked
out with CRLF newlines due to the attribute.
Create class cmVisualStudioSlnParser as a generic parser for Visual
Studio .sln files. Implement minimum functionality but keep class
extensible. Add tests for the class.
