[Bug c++/63705] function template specialization outside namespace rejected with C++11

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63705

--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
See also:
https://groups.google.com/a/isocpp.org/forum/#!topic/std-discussion/ZCRb8iZwtos