HTTP remote type

[gcotelli]

Sometimes you want to access a remote using plain HTTP and not HTTPS, for example for self-hosted instances.
In that case you need something like a HTTP remote type.

[gcotelli]

The changes should be pretty straighforward:

MCGitBasedNetworkRepository>>#httpUrl
	^ self httpsUrl copyReplaceAll: 'https://' with: 'http://'
MCGitBasedNetworkRepository>>#httpsUrl
       self subclassResponsibility

and changing Iceberg class>>#settingsOn: to include ('HTTP (http://github.com/<username>/<project>.git)' -> #httpUrl) as an option in the array.

I couldn't figure out how to use Iceberg to contribute to Iceberg. The Pharo 8 version is showing a lot of deprecation warnings and I cannot update the Pharo 7 version to the latests dev branch.

[astares]

@gc# The deprecations are due to Spec transition. You can just ignore them.

It would be good to open an issue on Iceberg repo for this (https://github.com/pharo-vcs/iceberg)

[guillep]

Fixed upstream