+test_file msg_18.txt msg_18-1.txt -R X-Foobar-Spoink-Defrobnit:\*
+test_file msg_01.txt msg_01-1.txt --set-header=X-Test:set
+test_file msg_01.txt msg_01-2.txt --set-header=X-Test:set --set-param=X-Test:test:set
+test_file msg_02.txt msg_02.txt --set-param=X-Test:test:set
+test_file msg_02.txt msg_02-1.txt --set-param=X-Mailer:test=set
+test_file msg_02.txt msg_02-1.txt --set-param=X-Mailer:test:set
+test_file msg_13.txt msg_13-1.txt -B '*/*'
+test_file msg_13.txt msg_13.txt -t 'text/*' -b 'image/*' -B '*/*'