Version Control With Subversion Source

syntax and recommendations."):

* en/book/ch09-reference.xml
(svn.ref.svnsync.sw): Note the new --revision (-r) option.
(svn.ref.svnsync.c.copy-revprops, svn.ref.svnsync.c.synchronize):
Document the new syntaxes for these subcommands, adding a
recommendation (by way of warning) to each about specifying the
source URL on the command-line.