gitea/models/migrations/v1_12
delvh e10ba5e5e0
Rename `Sync2` -> `Sync` ()
The xorm `Sync2` has already been deprecated in favor of `Sync`,
so let's do the same inside the Gitea codebase.

Command used to replace everything:
```sh
for i in $(ag Sync2 --files-with-matches); do vim $i -c ':%sno/Sync2/Sync/g' -c ':wq'; done
```
..
v117.go Rename `Sync2` -> `Sync` ()
v118.go Rename `Sync2` -> `Sync` ()
v119.go Implement FSFE REUSE for golang files ()
v120.go Rename `Sync2` -> `Sync` ()
v121.go Rename `Sync2` -> `Sync` ()
v122.go Rename `Sync2` -> `Sync` ()
v123.go Rename `Sync2` -> `Sync` ()
v124.go Rename `Sync2` -> `Sync` ()
v125.go Rename `Sync2` -> `Sync` ()
v126.go Implement FSFE REUSE for golang files ()
v127.go Rename `Sync2` -> `Sync` ()
v128.go Implement FSFE REUSE for golang files ()
v129.go Implement FSFE REUSE for golang files ()
v130.go Implement FSFE REUSE for golang files ()
v131.go Rename `Sync2` -> `Sync` ()
v132.go Rename `Sync2` -> `Sync` ()
v133.go Rename `Sync2` -> `Sync` ()
v134.go Implement FSFE REUSE for golang files ()
v135.go Rename `Sync2` -> `Sync` ()
v136.go Rename `Sync2` -> `Sync` ()
v137.go Rename `Sync2` -> `Sync` ()
v138.go Rename `Sync2` -> `Sync` ()
v139.go Refactor `setting.Database.UseXXX` to methods ()