Substitute in comment characters for lines partaining to login.conf,

BSD auth and SELinux and only enable them if pertinent.

sudoers.man.pl

@@ -0,0 +1,23 @@
+#!/usr/bin/perl -p
+
+BEGIN {
+    $t = undef;
+}
+
+if (/^\./) {
+    if (/^\.I[PX].*use_loginclass/) {
+	$t = '@LCMAN@';
+    } elsif (/^\.I[PX].*(role|type)/) {
+	$t = '@SEMAN@';
+    } else {
+	$t = undef;
+    }
+}
+
+# Fix up broken pod2man formatting of F<@foo@/bar>
+s/\\fI\\f(\(C)?I\@([^\@]*)\\fI\@/\\fI\@$2\@/g;
+
+# Comment out Compile-time-specific lines in DESCRIPTION
+if ($t) {
+    $_ = $t . $_;
+}