docs: Regenerate CLI docs

Fixes #5507

docs/content/en/commands/hugo.md

@@ -1,5 +1,5 @@
 ---
-date: 2018-11-05
+date: 2018-12-12
 title: "hugo"
 slug: hugo
 url: /commands/hugo/
@@ -31,11 +31,13 @@ hugo [flags]
       --cacheDir string        filesystem path to cache directory. Defaults: $TMPDIR/hugo_cache/
       --cleanDestinationDir    remove files from destination not found in static directories
       --config string          config file (default is path/config.yaml|json|toml)
+      --configDir string       config dir (default "config")
   -c, --contentDir string      filesystem path to content directory
       --debug                  debug output
   -d, --destination string     filesystem path to write files to
       --disableKinds strings   disable different kind of pages (home, RSS etc.)
       --enableGitInfo          add Git revision, date and author info to the pages
+  -e, --environment string     build environment
       --forceSyncStatic        copy all files when static is changed.
       --gc                     enable to run some cleanup tasks (remove unused cache files) after the build
   -h, --help                   help for hugo
@@ -74,4 +76,4 @@ hugo [flags]
 * [hugo server](/commands/hugo_server/)	 - A high performance webserver
 * [hugo version](/commands/hugo_version/)	 - Print the version number of Hugo
 
-###### Auto generated by spf13/cobra on 5-Nov-2018
+###### Auto generated by spf13/cobra on 12-Dec-2018