zsh: genfstab bring it up-to date

Add the -f(ilter) and -t(ag) options. The latter being mutually
exclusive with -L/-U.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>

Author: evelikov

completion/zsh/_genfstab

@@ -3,8 +3,10 @@
 local -a args=(
     '(-h --help)'{-h,--help}'[display help]'
     '-p[Avoid printing pseudofs mounts]'
-    '(-U)-L[Use labels for source identifiers]'
-    '(-L)-U[Use UUIDs for source identifiers]'
+    '-f[Restrict output to mountpoints matching the prefix FILTER]'
+    '(-U -L)-t[Use TAG for source identifiers]:tag:(LABEL UUID PARTLABEL PARTUUID)'
+    '(-U -t)-L[Use labels for source identifiers]'
+    '(-L -t)-U[Use UUIDs for source identifiers]'
     ':*:_path_files -/'
 )