Work on ruby 3.0+.

Index: install.rb
--- install.rb.orig
+++ install.rb
@@ -60,7 +60,7 @@ def do_configs(configs, target, strip = 'conf/')
   Dir.mkdir(target) unless File.directory? target
   configs.each do |cf|
     ocf = File.join(InstallOptions.config_dir, cf.gsub(/#{strip}/, ''))
-    FileUtils.install(cf, ocf, {:mode => 0644, :preserve => true, :verbose => true})
+    FileUtils.install(cf, ocf, :mode => 0644, :preserve => true, :verbose => true)
   end
 end
 
@@ -77,9 +77,9 @@ def do_libs(libs, strip = 'lib/')
     next if File.directory? lf
     olf = File.join(InstallOptions.site_dir, lf.sub(/^#{strip}/, ''))
     op = File.dirname(olf)
-    FileUtils.makedirs(op, {:mode => 0755, :verbose => true})
+    FileUtils.makedirs(op, :mode => 0755, :verbose => true)
     FileUtils.chmod(0755, op)
-    FileUtils.install(lf, olf, {:mode => 0644, :preserve => true, :verbose => true})
+    FileUtils.install(lf, olf, :mode => 0644, :preserve => true, :verbose => true)
   end
 end
 
@@ -87,9 +87,9 @@ def do_man(man, strip = 'man/')
   man.each do |mf|
     omf = File.join(InstallOptions.man_dir, mf.gsub(/#{strip}/, ''))
     om = File.dirname(omf)
-    FileUtils.makedirs(om, {:mode => 0755, :verbose => true})
+    FileUtils.makedirs(om, :mode => 0755, :verbose => true)
     FileUtils.chmod(0755, om)
-    FileUtils.install(mf, omf, {:mode => 0644, :preserve => true, :verbose => true})
+    FileUtils.install(mf, omf, :mode => 0644, :preserve => true, :verbose => true)
     # Solaris does not support gzipped man pages. When called with
     # --no-check-prereqs/without facter the default gzip behavior still applies
     unless $operatingsystem == "Solaris"
@@ -105,9 +105,9 @@ def do_locales(locale, strip = 'locales/')
     next if File.directory? lf
     olf = File.join(InstallOptions.locale_dir, lf.sub(/^#{strip}/, ''))
     op = File.dirname(olf)
-    FileUtils.makedirs(op, {:mode => 0755, :verbose => true})
+    FileUtils.makedirs(op, :mode => 0755, :verbose => true)
     FileUtils.chmod(0755, op)
-    FileUtils.install(lf, olf, {:mode => 0644, :preserve => true, :verbose => true})
+    FileUtils.install(lf, olf, :mode => 0644, :preserve => true, :verbose => true)
   end
 end