Revert "In PHP includes, changes payloads -> dist."

This reverts commit 45e253c914ddfa75c1e693de137b5bdd7a5aa261.
Revert "Renames payloads -> dist."

This reverts commit a481f1fe2007fc681cc9fa674a44a96865b702b2.
Renames /payloads -> /dist, again.