Topic: memcached 1.5.0

See Memcached 1.5.0 Release Notes
For now in "remi-test" as this is an important jump.

Feedback expected => https://github.com/remicollet/remirepo/issues/76
Plan to move it to "remi" quite shortly.

Desktop: Fedora 25 x86_64 + rpmfusion + remi-test + remi-dev
Laptop:  Fedora 26 x86_64 + remi (SCL only)
Hosting Server: CentOS 6.9 x86_64 + EPEL + remi + remi-php70