netrc: fix password-only entries

When a specific hostname matched, and only a password is set before
another machine is specified in the netrc file, the parser would not be
happy and stop there and return the password-only state. It instead
continued and did not return a match.

Add test 2005 to verify this case

Regression from e9b9bba, shipped in 8.11.1.

Reported-by: Ben Zanin
Fixes #15767
Closes #15768

tests/data/test2005

@@ -0,0 +1,55 @@
+<testcase>
+<info>
+<keywords>
+HTTP
+netrc
+</keywords>
+</info>
+#
+# Server-side
+<reply>
+<data>
+HTTP/1.1 200 OK
+Date: Fri, 05 Aug 2022 10:09:00 GMT
+Server: test-server/fake
+Content-Type: text/plain
+Content-Length: 6
+Connection: close
+
+-foo-
+</data>
+</reply>
+
+#
+# Client-side
+<client>
+<server>
+http
+</server>
+<name>
+netrc match with password only in file, no username. machine follows
+</name>
+<command>
+--netrc-optional --netrc-file %LOGDIR/netrc%TESTNUMBER http://%HOSTIP:%HTTPPORT/
+</command>
+<file name="%LOGDIR/netrc%TESTNUMBER" >
+machine %HOSTIP
+password 5up3r53cr37
+
+machine example.com
+</file>
+</client>
+
+#
+# Verify data after the test has been "shot"
+<verify>
+<protocol>
+GET / HTTP/1.1
+Host: %HOSTIP:%HTTPPORT
+Authorization: Basic %b64[:5up3r53cr37]b64%
+User-Agent: curl/%VERSION
+Accept: */*
+
+</protocol>
+</verify>
+</testcase>