curl_share_setopt.3: improve wording [ci ship]

Reported-by: Carlos ORyan

Author: bagder

docs/libcurl/curl_share_setopt.3

@@ -5,7 +5,7 @@
 .\" *                            | (__| |_| |  _ <| |___
 .\" *                             \___|\___/|_| \_\_____|
 .\" *
-.\" * Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
+.\" * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
 .\" *
 .\" * This software is licensed as described in the file COPYING, which
 .\" * you should have received as part of this distribution. The terms
@@ -37,8 +37,8 @@ prototype:
 void lock_function(CURL *handle, curl_lock_data data, curl_lock_access access,
 void *userptr);
 
-\fIdata\fP defines what data libcurl wants to lock, and you must make sure that
-only one lock is given at any time for each kind of data.
+The \fIdata\fP argument tells what kind of data libcurl wants to lock. Make
+sure that the callback uses a different lock for each kind of data.
 
 \fIaccess\fP defines what access type libcurl wants, shared or single.