Update the working copy to a different URL.
usage: 1. switch URL[@PEGREV] [PATH]
2. switch --relocate FROM TO [PATH...]
1. Update the working copy to mirror a new URL within the repository.
This behavior is similar to 'svn update', and is the way to
move a working copy to a branch or tag within the same repository.
If specified, PEGREV determines in which revision the target is first
looked up.
If --force is used, unversioned obstructing paths in the working
copy do not automatically cause a failure if the switch attempts to
add the same path. If the obstructing path is the same type (file
or directory) as the corresponding path in the repository it becomes
versioned but its contents are left 'as-is' in the working copy.
This means that an obstructing directory's unversioned children may
also obstruct and become versioned. For files, any content differences
between the obstruction and the repository are treated like a local
modification to the working copy. All properties from the repository
are applied to the obstructing path.
Use the --set-depth option to set a new working copy depth on the
targets of this operation. Currently, the depth of a working copy
directory can only be increased (telescoped more deeply); you cannot
make a directory more shallow.
2. Rewrite working copy URL metadata to reflect a syntactic change only.
This is used when repository's root URL changes (such as a scheme
or hostname change) but your working copy still reflects the same
directory within the same repository.
See also 'svn help update' for a list of possible characters
reporting the action taken.
