Fixed a memory leak when specifying a proxy with a file: URL and added

test case 288 to verify it.

tests/data/Makefile.am

@@ -37,4 +37,4 @@ EXTRA_DIST = test1 test108 test117 test127 test20 test27 test34 test46	   \
  test274 test275 test524 test525 test276 test277 test526 test527 test528   \
  test530 DISABLED test278 test279 test531 test280 test529 test532 test533  \
  test534 test535 test281 test537 test282 test283 test284 test538 test285   \
- test286 test307 test308 test287 test400
+ test286 test307 test308 test287 test400 test288

tests/data/test288

@@ -0,0 +1,42 @@
+<testcase>
+# Server-side
+<reply>
+<data>
+foo
+   bar
+bar
+   foo
+moo
+</data>
+</reply>
+
+# Client-side
+<client>
+<server>
+none
+</server>
+<features>
+file
+</features>
+ <name>
+file:// with (unsupported) proxy, authentication and range
+ </name>
+<setenv>
+all_proxy=http://fake:user@%HOSTIP:%HTTPPORT/
+</setenv>
+ <command>
+file://localhost/%PWD/log/test288.txt
+</command>
+<file name="log/test288.txt">
+foo
+   bar
+bar
+   foo
+moo
+</file>
+</client>
+
+# Verify data after the test has been "shot"
+<verify>
+</verify>
+</testcase>