Log Message:
Update contao210 package to 2.10.1.

From release announce:

The maintenance release provides stability fixes for the version 2.10
branch and updates TinyMCE to version 3.4.4 (which fixes a few IE9
issues).

pkgsrc change:

Add a note to MESSAGE needs of www/php-tidy package when using minify
the HTML markup function of Contao 2.10.