patch 8.0.1006: quickfix list changes when parsing text with 'erroformat'

Problem:    Cannot parse text with 'erroformat' without changing a quickfix
            list.
Solution:   Add the "text" argument to getqflist(). (Yegappan Lakshmanan)
diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index 37e849c..a1a76f9 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -4616,6 +4616,11 @@
 			nr	get information for this quickfix list; zero
 				means the current quickfix list and '$' means
 				the last quickfix list
+			text	use 'errorformat' to extract items from the
+				text and return the resulting entries. The
+				value can be a string with one line or a list
+				with multiple lines. The current quickfix list
+				is not modified.
 			title	get the list title
 			winid	get the |window-ID| (if opened)
 			all	all of the above quickfix properties
@@ -4624,6 +4629,9 @@
 		To get the number of lists in the quickfix stack, set 'nr' to
 		'$' in {what}. The 'nr' value in the returned dictionary
 		contains the quickfix stack size.
+		When 'text' is specified, all the other items are ignored. The
+		returned dictionary contains the entry 'items' with the list
+		of entries.
 		In case of error processing {what}, an empty dictionary is
 		returned.