tests: Cleaned up netrc testing.

Removed the "netrc_debug" keyword replaced with --netrc-file additions.
Removed the debug code from Curl_parsenetrc as it is superseeded by
--netrc-file.

tests/data/test131

@@ -31,9 +31,6 @@ dr-xr-xr-x   5 0        1            512 Oct  1  1997 usr
 #
 # Client-side
 <client>
-<features>
-netrc_debug
-</features>
 <server>
 ftp
 </server>
@@ -41,7 +38,7 @@ ftp
 FTP (optional .netrc; user/no pass) dir list PASV
  </name>
  <command>
---netrc-optional ftp://user2@%HOSTIP:%FTPPORT/
+--netrc-optional --netrc-file log/netrc ftp://user2@%HOSTIP:%FTPPORT/
 </command>
 <file name="log/netrc" >
 # the following two lines were created while testing curl