Document ignore-case backend command

But keep `keep-prefix` undocumented.

https://github.com/company-mode/company-mode/issues/134
https://github.com/proofit404/company-anaconda/issues/6

diff --git a/company.el b/company.el
index 8bb7ea338efa888ffd0ece8c7b8c9fc69d3d9a82..af5c04069b424648863bb1f6f9f569161a94ccb6 100644 (file)
--- a/company.el
+++ b/company.el
@@ -366,6 +366,11 @@ from the list.
 progresses, unless the back-end returns t for this command.  The second
 argument is the latest prefix.
 
+`ignore-case': Return t here if the backend returns case-insensitive
+matches.  This value is used to determine the longest common prefix (as
+used in `company-complete-common'), and to filter completions when fetching
+them from cache.
+
 `meta': The second argument is a completion candidate.  Return a (short)
 documentation string for it.