Remove limit on remove_headers item size. Bug 1533

Author: Jeremy Harris

doc/doc-txt/ChangeLog

@@ -44,6 +44,11 @@ JH/05 Fix results-pipe from transport process.  Several recipients, combined
       to notice due to the introduction of conection certificate information,
       the item size being so much larger.  Found and fixed by Wolfgang Breyha.
 
+JH/06 Bug 1533: Fix truncation of items in headers_remove lists.  A fixed
+      size buffer was used, resulting in syntax errors when an expansion
+      exceeded it.
+
+
 Exim version 4.84
 -----------------
 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static

src/src/transport.c

@@ -643,8 +643,7 @@ for (h = header_list; h != NULL; h = h->next) if (h->type != htype_old)
       {
       int sep = ':';         /* This is specified as a colon-separated list */
       uschar *s, *ss;
-      uschar buffer[128];
-      while ((s = string_nextinlist(&list, &sep, buffer, sizeof(buffer))))
+      while ((s = string_nextinlist(&list, &sep, NULL, 0)))
 	{
 	int len;