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Merge pull request #2403 from huglester/patch-3

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Fixing issue with form tag placement.

Having the form tag in the title section was causing some fields (namely WYSIWYG fields) to not submit properly. This is the fix.
Fixes issue pyrocms/pyrocms-professional#113
Merge pull request #2438 from obrignoni/2.1/fix-keywords-field-type-assets

Fixes issue pyrocms/pyrocms-professional#113
Fixes #2478: IPv6 support backported for 2.1.x
Fixing undefined variable in datetime field.

Fixes #2593.
Merge branch '2.1/develop' of https://github.com/wilfreddekok/PyroCMS

Conflicts:
	system/cms/modules/files/plugin.php
	system/cms/modules/streams_core/field_types/keywords/field.keywords.php
	system/cms/modules/users/views/admin/form.php