Update networking layer w/ CURL and emscripten impl

External/curl-8.17.0/tests/data/test528

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+<testcase>
+<info>
+<keywords>
+HTTP
+HTTP GET
+multi
+</keywords>
+</info>
+
+# Server-side
+<reply>
+<data crlf="headers">
+HTTP/1.1 200 OK
+Date: Tue, 09 Nov 2010 14:49:00 GMT
+Server: test-server/fake
+Content-Length: 47
+
+file contents should appear once for each file
+</data>
+<datacheck>
+file contents should appear once for each file
+file contents should appear once for each file
+file contents should appear once for each file
+file contents should appear once for each file
+</datacheck>
+</reply>
+
+# Client-side
+<client>
+<server>
+http
+</server>
+<tool>
+lib526
+</tool>
+<name>
+HTTP GET same file using different handles but same connection
+</name>
+<command>
+http://%HOSTIP:%HTTPPORT/path/%TESTNUMBER
+</command>
+</client>
+
+# Verify data after the test has been "shot"
+<verify>
+<protocol crlf="headers">
+GET /path/%TESTNUMBER HTTP/1.1
+Host: %HOSTIP:%HTTPPORT
+Accept: */*
+
+GET /path/%TESTNUMBER HTTP/1.1
+Host: %HOSTIP:%HTTPPORT
+Accept: */*
+
+GET /path/%TESTNUMBER HTTP/1.1
+Host: %HOSTIP:%HTTPPORT
+Accept: */*
+
+GET /path/%TESTNUMBER HTTP/1.1
+Host: %HOSTIP:%HTTPPORT
+Accept: */*
+
+</protocol>
+</verify>
+</testcase>