Felix Arntz 2295ed8031 Multisite: Remove restriction of minimum site name length in wpmu_validate_blog_signup(). ...

It is sometimes desirable to support shorter site names than 4 characters, therefore that restriction should be removed. It is still possible to manually enforce it by using the `wpmu_validate_blog_signup` filter.

As a result of this change, another `is_super_admin()` call gets removed which affects the ongoing efforts of working on a network-wide role system.

Props milindmore22.
Fixes #39676. See #37616.

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git-svn-id: http://core.svn.wordpress.org/trunk@40202 1a063a9b-81f0-0310-95a4-ce76da25c4cd

2017-03-17 14:36:43 +00:00

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