Add test for syntax error when defining an alias using a reserved word.

MANIFEST

@@ -829,6 +829,8 @@ plugins/sudoers/regress/testsudoers/test11.out.ok
 plugins/sudoers/regress/testsudoers/test11.sh
 plugins/sudoers/regress/testsudoers/test12.out.ok
 plugins/sudoers/regress/testsudoers/test12.sh
+plugins/sudoers/regress/testsudoers/test13.out.ok
+plugins/sudoers/regress/testsudoers/test13.sh
 plugins/sudoers/regress/testsudoers/test2.inc
 plugins/sudoers/regress/testsudoers/test2.out.ok
 plugins/sudoers/regress/testsudoers/test2.sh

plugins/sudoers/regress/testsudoers/test13.out.ok

@@ -0,0 +1,22 @@
+Testing alias definitions using reserved words
+
+sudoers:1: syntax error, reserved word used as an alias name
+Cmnd_Alias ALL=ALL
+           ^~~
+sudoers:2: syntax error, reserved word used as an alias name
+Cmnd_Alias CHROOT=foo
+           ^~~~~~
+sudoers:3: syntax error, reserved word used as an alias name
+User_Alias TIMEOUT=foo
+           ^~~~~~~
+sudoers:4: syntax error, reserved word used as an alias name
+Runas_Alias CWD=bar
+            ^~~
+sudoers:5: syntax error, reserved word used as an alias name
+Host_Alias NOTBEFORE=baz
+           ^~~~~~~~~
+sudoers:6: syntax error, reserved word used as an alias name
+Host_Alias NOTAFTER=biff
+           ^~~~~~~~
+
+root ALL = ALL

plugins/sudoers/regress/testsudoers/test13.sh

@@ -0,0 +1,23 @@
+#!/bin/sh
+#
+# Test sudoers file with reserved words as alias names.
+# The standard error output is dup'd to the standard output.
+#
+
+# Avoid warnings about memory leaks when there is a syntax error
+ASAN_OPTIONS=detect_leaks=0; export ASAN_OPTIONS
+
+echo "Testing alias definitions using reserved words"
+echo ""
+./testsudoers -d <<EOF 2>&1
+Cmnd_Alias ALL=ALL
+Cmnd_Alias CHROOT=foo
+User_Alias TIMEOUT=foo
+Runas_Alias CWD=bar
+Host_Alias NOTBEFORE=baz
+Host_Alias NOTAFTER=biff
+
+root ALL = ALL
+EOF
+
+exit 0