* intf-http.txt: update doc (strsub)

diff --git a/doc/intf-http.txt b/doc/intf-http.txt
index fadfe0af3ff2e96103c2c8034b386f9db2ae956b..a4954ef872efc700baa67f6d5fc43825c87cf429 100644 (file)
--- a/doc/intf-http.txt
+++ b/doc/intf-http.txt
@@ -179,6 +179,8 @@ You have access to :
     strncmp         : compare the ST(3) first characters of ST(1) and ST(2),
                       push -1, 0, or 1
     strlen          : push the length of ST(1)
+    strsub          : extract substring of ST(1) from character number ST(2)
+                      to character number ST(3)
  * stack manipulation
     dup             : duplicate ST(1) on the stack
     drop            : remove ST(1)