Git 2.45

1. 5545442 *.[ch]: remove extern from function declarations using spatch by Denton Liu · 7 years ago
2. aca4240 prio-queue: add 'peek' operation by Derrick Stolee · 7 years ago
3. e8f91e3 prio-queue: make output stable with respect to insertion by Jeff King · 11 years ago
4. da24b10 sort-in-topological-order: use prio-queue by Junio C Hamano · 13 years ago
5. b4b594a prio-queue: priority queue of pointers to structs by Junio C Hamano · 13 years ago