[Modules] module-warn

[Xavier D. <xav...@gm...>]

Dear All,

Next version (5.6) will come with new modulefile command:
"module-warn". This command defines a warning message to print when
loading specified modulefiles.

See example at https://modules.readthedocs.io/en/latest/MIGRATING.html#issue-warning-upon-module-evaluation

Regards,
Xavier