Merge pull request #2181 from MichaelChirico/zip-doc

further clarify st_read() of .zip files

Author: edzer

R/read.R

@@ -77,7 +77,10 @@ set_utf8 = function(x) {
 #' In case of problems reading shapefiles from USB drives on OSX, please see
 #' \url{https://github.com/r-spatial/sf/issues/252}. Reading shapefiles (or other
 #' data sources) directly from zip files can be done by prepending the path 
-#' with \code{/vsizip/}, see also \url{https://github.com/r-spatial/sf/pull/1514}
+#' with \code{/vsizip/}. This is part of the GDAL Virtual File Systems interface
+#' that also supports .gz, curl, and other operations, including chaining; see
+#' \url{https://gdal.org/user/virtual_file_systems.html} for a complete
+#' description and examples.
 #'
 #' For \code{query} with a character \code{dsn} the query text is handed to
 #' 'ExecuteSQL' on the GDAL/OGR data set and will result in the creation of a