Manage different translation URL format

[maximejobin]

These URLs should be supported:

• https://translate.wordpress.org/locale/fr-ca/default/wp-themes/weaver-xtreme/
• https://translate.wordpress.org/projects/wp-themes/weaver-xtreme/fr-ca/default/

The same behavior applies to plugins. Validate for meta and apps.

[cedricus]

All three examples in README.MD are not working including for meta (ios and wordcamp).

C:\xampp\php\www\wordpress>wp po merge fr-ca fr https://translate.wordpress.org/locale/fr-ca/default/wp-plugins/wordpress-seo/
Error: The URL type could not be detected.

C:\xampp\php\www\wordpress>wp po merge fr-ca fr https://translate.wordpress.org/locale/en-ca/default/apps/ios/
Error: The URL type could not be detected.

C:\xampp\php\www\wordpress>wp po merge fr-ca fr https://translate.wordpress.org/locale/fr-ca/default/meta/wordcamp/
Error: The URL type could not be detected.

[maximejobin]

You should use, for now, the plugins homepage. This is a regression bug that was introduced in a previous update.

[maximejobin]

The middle example you gave will not work because fr-ca doesn't have strings for the iOS app.

The next commit will fix the bug.