Adding d/p/21_check_http_faster_with_large_files from upstream

debian/patches/21_check_http_faster_with_large_files

@@ -0,0 +1,37 @@
+From 763862a61cf5a7ba1a10f607022aac2434c79f57 Mon Sep 17 00:00:00 2001
+From: Danijel Tasov <data@consol.de>
+Date: Wed, 21 Dec 2022 14:48:11 +0100
+Subject: [PATCH] make check_http faster with larger files
+
+The current implementation becomes exponentially slower with growing
+response size.
+
+See also:
+
+https://github.com/nagios-plugins/nagios-plugins/blob/release-2.4.2/plugins/check_http.c#L1199-L1204
+
+---
+ plugins/check_http.c | 9 +++++++--
+ 1 file changed, 7 insertions(+), 2 deletions(-)
+
+diff --git a/plugins/check_http.c b/plugins/check_http.c
+index 41d478163..1835a2d09 100644
+--- a/plugins/check_http.c
++++ b/plugins/check_http.c
+@@ -1095,9 +1095,14 @@ check_http (void)
+       *pos = ' ';
+     }
+     buffer[i] = '\0';
+-    xasprintf (&full_page_new, "%s%s", full_page, buffer);
+-    free (full_page);
++
++    if ((full_page_new = realloc(full_page, pagesize + i + 1)) == NULL)
++        die (STATE_UNKNOWN, _("HTTP UNKNOWN - Could not allocate memory for full_page\n"));
++
++    memmove(&full_page_new[pagesize], buffer, i + 1);
++
+     full_page = full_page_new;
++
+     pagesize += i;
+ 
+                 if (no_body && document_headers_done (full_page)) {

debian/patches/series

@@ -9,3 +9,4 @@
 18_check_icmp_help
 19_check_disk_fs_usage
 20_check_apt_unknown_escape_sequence
+21_check_http_faster_with_large_files