curl: add --remove-on-error

If a transfer returns an error, using this option makes curl remove the
leftover downloded (partial) local file before exiting.

Added test 376 to verify

Closes #8503

tests/data/Makefile.inc

@@ -61,7 +61,7 @@ test334 test335 test336 test337 test338 test339 test340 test341 test342 \
 test343 test344 test345 test346 test347 test348 test349 test350 test351 \
 test352 test353 test354 test355 test356 test357 test358 test359 test360 \
 test361 test362 test363 test364 test365 test366 test367 test368 test369 \
-test370 test371 test372 test373 test374 test375 \
+test370 test371 test372 test373 test374 test375 test376 \
 \
 test380 test381 test383 test384 test385 test386 \
 \

tests/data/test376

@@ -0,0 +1,64 @@
+<testcase>
+<info>
+<keywords>
+HTTP
+HTTP GET
+</keywords>
+</info>
+
+#
+# Crafted to cause error 18
+<reply>
+<data nocheck="yes">
+HTTP/1.1 200 OK swsclose
+Date: Tue, 09 Nov 2010 14:49:00 GMT
+Server: test-server/fake
+Last-Modified: Tue, 13 Jun 2000 12:10:00 GMT
+ETag: "21025-dc7-39462498"
+Accept-Ranges: bytes
+Content-Length: 75
+Connection: close
+Content-Type: text/html
+Funny-head: yesyes
+
+-foo-
+</data>
+</reply>
+
+#
+# Client-side
+<client>
+<server>
+http
+</server>
+ <name>
+HTTP GET
+ </name>
+ <command option="no-output">
+http://%HOSTIP:%HTTPPORT/%TESTNUMBER -o log/save-%TESTNUMBER --remove-on-error
+</command>
+</client>
+
+#
+# Verify data after the test has been "shot". hyper doesn't do error 18
+<verify>
+<errorcode>
+%if hyper
+56
+%else
+18
+%endif
+</errorcode>
+<protocol>
+GET /%TESTNUMBER HTTP/1.1
+Host: %HOSTIP:%HTTPPORT
+User-Agent: curl/%VERSION
+Accept: */*
+
+</protocol>
+
+# the file should be empty now
+<file name="log/save-%TESTNUMBER">
+</file>
+</verify>
+</testcase>