Added a recommendation about mbstring.func_overload option
feature #174 Added a recommendation about mbstring.func_overload option (javiereguiluz)

This PR was squashed before being merged into the 3.0.x-dev branch (closes #174).

Discussion
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Added a recommendation about mbstring.func_overload option

This fixes #173

Commits
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de53853 Added a recommendation about mbstring.func_overload option