Support path-based S3 storage. Closes #1495 (#1496)

* Support path-based S3 storage. Closes #1495

Revert "Remove forcing old path-style URLs with s3. Closes #497"

This reverts commit b2953028cf.

* #1495 Path-style S3 compatibile URLs implemented

https://github.com/owncast/owncast/issues/1495

It gives ability to use S3 compatibile providers that doesn't
support virtual-host-style URLs (i.e. Oracle Cloud Object Storage)

Co-authored-by: Artur Angiel <artur@angiel.ovh>

core/storageproviders/s3Storage.go

@@ -34,6 +34,7 @@ type S3Storage struct {
 	s3AccessKey       string
 	s3Secret          string
 	s3ACL             string
+	s3ForcePathStyle  bool
 
 	// If we try to upload a playlist but it is not yet on disk
 	// then keep a reference to it here.
@@ -67,6 +68,7 @@ func (s *S3Storage) Setup() error {
 	s.s3AccessKey = s3Config.AccessKey
 	s.s3Secret = s3Config.Secret
 	s.s3ACL = s3Config.ACL
+	s.s3ForcePathStyle = s3Config.ForcePathStyle
 
 	s.sess = s.connectAWS()
 
@@ -184,9 +186,10 @@ func (s *S3Storage) connectAWS() *session.Session {
 
 	sess, err := session.NewSession(
 		&aws.Config{
-			Region:      aws.String(s.s3Region),
-			Credentials: creds,
-			Endpoint:    aws.String(s.s3Endpoint),
+			Region:           aws.String(s.s3Region),
+			Credentials:      creds,
+			Endpoint:         aws.String(s.s3Endpoint),
+			S3ForcePathStyle: aws.Bool(s.s3ForcePathStyle),
 		},
 	)