rename internal functions

...to avoid POD coverage failures.
Дист::Зилла roundhouse kick
changelog++
v0.11

        - assume TAP version 13 if TAP::Parser supports this (v3.22+)
        - TAP-DOM "reverse": to_tap() produces TAP from a TAP::DOM
        - distro polishing (misc & rt#90178)
        - Дист::Зилла roundhouse kick