remote - stage files from remote urls

Usage:

# Specify the remote source kind
kind: remote

# Optionally specify a relative staging filename.
# If not specified, the basename of the url will be used.
# filename: customfilename

# Optionally specify whether the downloaded file should be
# marked executable.
# executable: true

# Specify the url. Using an alias defined in your project
# configuration is encouraged. 'bst source track' will update the
# sha256sum in 'ref' to the downloaded file's sha256sum.
url: upstream:foo

# Specify the ref. It's a sha256sum of the file you download.
ref: 6c9f6f68a131ec6381da82f2bff978083ed7f4f7991d931bfa767b7965ebc94b

See built-in base class functionality doumentation and built-in downloadable file source functionality doumentation for details on common configuration options applicable to this source.

Reporting SourceInfo

The remote source does not override any of the DownloadableFileSource reporting functionality and as such, behaves as described in the default reporting of SourceInfo documentation.