add curl 7.16.0 to in tree libs

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@3744 d0543943-73ff-0310-b7d9-9358b9ac24b2

libs/curl/lib/README.curlx

@@ -0,0 +1,62 @@
+$Id: README.curlx,v 1.2 2004/04/30 08:51:19 bagder Exp $
+                                  _   _ ____  _     
+                              ___| | | |  _ \| |    
+                             / __| | | | |_) | |    
+                            | (__| |_| |  _ <| |___ 
+                             \___|\___/|_| \_\_____|
+
+                     Source Code Functions Apps Might Use
+                     ====================================
+
+The libcurl source code offers a few functions by source only. They are not
+part of the official libcurl API, but the source files might be useful for
+others so apps can optionally compile/build with these sources to gain
+additional functions.
+
+We provide them through a single header file for easy access for apps:
+"curlx.h"
+
+ curlx_strtoofft()
+
+   A macro that converts a string containing a number to a curl_off_t number.
+   This might use the curlx_strtoll() function which is provided as source
+   code in strtoofft.c. Note that the function is only provided if no
+   strtoll() (or equivalent) function exist on your platform. If curl_off_t
+   is only a 32 bit number on your platform, this macro uses strtol().
+
+ curlx_tvnow()
+
+   returns a struct timeval for the current time.
+
+ curlx_tvdiff()
+
+   returns the difference between two timeval structs, in number of
+   milliseconds.
+
+ curlx_tvdiff_secs()
+
+   returns the same as curlx_tvdiff but with full usec resolution (as a
+   double)
+
+FUTURE
+======
+
+ Several functions will be removed from the public curl_ name space in a
+ future libcurl release. They will then only become available as curlx_
+ functions instead. To make the transition easier, we already today provide
+ these functions with the curlx_ prefix to allow sources to get built properly
+ with the new function names. The functions this concerns are:
+
+      curlx_getenv
+      curlx_strequal
+      curlx_strnequal
+      curlx_mvsnprintf
+      curlx_msnprintf
+      curlx_maprintf
+      curlx_mvaprintf
+      curlx_msprintf
+      curlx_mprintf
+      curlx_mfprintf
+      curlx_mvsprintf
+      curlx_mvprintf
+      curlx_mvfprintf