FTPFileSystemProvider and FTPSFileSystemProvider now allow URIs with user info and paths when creating new FTP(S) file systems. These are used for the user credentials and default directory respectively. However, if the given environment already contains user credentials the URI still cannot contain any user info, and if the given environment already contains a default directory the URI still cannot contain a path (except for a single /, which is now always allowed).
FTPFileSystemProvider and FTPSFileSystemProvider now try to create a new FTP(S) file system when getPath is called for a non-existing FTP(S) file system, using the user info of the URI for the user credentials. Any other settings cannot be provided through the URI (including the default directory). To still be able to provide these, FTPEnvironment and FTPSEnvironment now have method setDefault. This can be useful for providing pool configurations, timeouts, etc. URIs can also contain query parameters to provide URI-specific settings; see usages of QueryParam and QueryParams for the possible query parameters.
FTP paths are now normalized before being used in FTP commands. This prevents unexpected errors when used with relative paths or an empty path.
FTPEnvironment and FTPSEnvironment now use a default 30 second connect timeout. This should prevent infinite waiting if connections cannot be established.
FTPEnvironment.copy and FTPSEnvironment.copy no longer fail when called with a null map but instead return an empty environment.