Fix for + signs in filenames within S3-hosted apt repositories
Fix for + signs in filenames within S3-hosted apt repositories

Amazon S3 has a bug wherein it treats the `+` character in URLs as a
space, rather than a distinct path character. As a result, all `+`
characters must be encoded to `%2B` in order to be accessible on S3.

Per Amazon's official proposed solution, this patch forcibly URL-encodes
all RFC 3986 characters that are part of the filename so generated
repositories function correctly on S3 even when package filenames
contain the + character.

dnbert/prm,trel/prm,dnbert/prm,trel/prm,glensc/prm,glensc/prm