tests: Added error code explanation comments

tests/data/test856

@@ -29,11 +29,12 @@ pop3://%HOSTIP:%POP3PORT/856 -u user:wrong
 #
 # Verify data after the test has been "shot"
 <verify>
+# 67 - CURLE_LOGIN_DENIED
 <errorcode>
 67
 </errorcode>
 #
-# The multi interface considers a broken "DO" request as a prematurely broken
+# The multi interface considers a broken "CONNECT" as a prematurely broken
 # transfer and such a connection will not get a "QUIT"
 <protocol>
 CAPA

tests/data/test913

@@ -37,6 +37,7 @@ smtp://%HOSTIP:%SMTPPORT/913 --mail-rcpt recipient@example.com --mail-from sende
 #
 # Verify data after the test has been "shot"
 <verify>
+# 55 - CURLE_SEND_ERROR
 <errorcode>
 55
 </errorcode>

tests/data/test914

@@ -33,6 +33,7 @@ smtp://%HOSTIP:%SMTPPORT/914 --mail-rcpt recipient@example.com --mail-from inval
 #
 # Verify data after the test has been "shot"
 <verify>
+# 55 - CURLE_SEND_ERROR
 <errorcode>
 55
 </errorcode>

tests/data/test916

@@ -33,6 +33,7 @@ smtp://%HOSTIP:%SMTPPORT/916 --mail-rcpt invalid --mail-from sender@example.com
 #
 # Verify data after the test has been "shot"
 <verify>
+# 55 - CURLE_SEND_ERROR
 <errorcode>
 55
 </errorcode>

tests/data/test918

@@ -33,6 +33,7 @@ smtp://%HOSTIP:%SMTPPORT/918 --mail-rcpt recipient.one@example.com --mail-rcpt i
 #
 # Verify data after the test has been "shot"
 <verify>
+# 55 - CURLE_SEND_ERROR
 <errorcode>
 55
 </errorcode>