a select command invalid selection variable name is now a fatal error in posix mode; many test suite additions

tests/invocation.right

@@ -0,0 +1,77 @@
+.: .: Is a directory
+bash: -c: option requires an argument
+bash: --badopt: invalid option
+bash [GNU long option] [option] ...
+bash [GNU long option] [option] script-file ...
+GNU long options:
+	--debug
+	--debugger
+	--dump-po-strings
+	--dump-strings
+	--help
+	--init-file
+	--login
+	--noediting
+	--noprofile
+	--norc
+	--posix
+	--pretty-print
+	--rcfile
+	--restricted
+	--verbose
+	--version
+Shell options:
+	-ilrsD or -c command or -O shopt_option		(invocation only)
+	-abefhkmnptuvxBCEHPT or -o option
+bash: --initfile: invalid option
+bash [GNU long option] [option] ...
+bash [GNU long option] [option] script-file ...
+GNU long options:
+	--debug
+	--debugger
+	--dump-po-strings
+	--dump-strings
+	--help
+	--init-file
+	--login
+	--noediting
+	--noprofile
+	--norc
+	--posix
+	--pretty-print
+	--rcfile
+	--restricted
+	--verbose
+	--version
+Shell options:
+	-ilrsD or -c command or -O shopt_option		(invocation only)
+	-abefhkmnptuvxBCEHPT or -o option
+bash: -q: invalid option
+bash [GNU long option] [option] ...
+bash [GNU long option] [option] script-file ...
+GNU long options:
+	--debug
+	--debugger
+	--dump-po-strings
+	--dump-strings
+	--help
+	--init-file
+	--login
+	--noediting
+	--noprofile
+	--norc
+	--posix
+	--pretty-print
+	--rcfile
+	--restricted
+	--verbose
+	--version
+Shell options:
+	-ilrsD or -c command or -O shopt_option		(invocation only)
+	-abefhkmnptuvxBCEHPT or -o option
+this-bash
+$- for -c includes c
+a
+a
+bad-interp
+./invocation.tests: ./x23: nosuchfile: bad interpreter: No such file or directory