Add backwards compatibility for ignore file

[lancepioch]

wings/server/backup.go

Line 38 in d411477

f, st, err := s.Filesystem().File(".pelicanignore")

If the pelican ignore file isn't found we should check for the old pterodactyl one

[notAreYouScared]

If .pteroignore should be found it should be renamed to .pelicanignore

[QuintenQVD0]

If .pteroignore should be found it should be renamed to .pelicanignore

if we do, would that not conflict with the git auto pull for repo's as a local change is made?
Should we not just check for both?

[QuintenQVD0]

@iamkubi Would this be an ok solution?