Fixed a couple more locale-dependent toupper conversions, mainly for

clarity.  This does fix one problem that causes ;type=i FTP URLs
to fail in the Turkish locale when CURLOPT_PROXY_TRANSFER_MODE is
used (test case 561)

Added tests 561 and 1092 through 1094 to test various combinations
of ;type= and ;mode= URLs that could potentially fail in the Turkish
locale.

tests/data/test1093

@@ -0,0 +1,44 @@
+<testcase>
+<info>
+<keywords>
+TFTP
+TFTP RRQ
+mode=
+</keywords>
+</info>
+
+#
+# Server-side
+<reply>
+<data>
+a chunk of
+data
+returned
+ to client
+</data>
+</reply>
+
+#
+# Client-side
+<client>
+<server>
+tftp
+</server>
+ <name>
+TFTP retrieve with mode=i
+ </name>
+ <command>
+"tftp://%HOSTIP:%TFTPPORT//1093;mode=i" --use-ascii --trace-ascii log/traceit
+</command>
+</client>
+
+#
+# Verify pseudo protocol after the test has been "shot"
+<verify>
+<protocol>
+opcode: 1
+filename: /1093
+mode: octet
+</protocol>
+</verify>
+</testcase>