[RELEASE] Released version 2.4.4

Released version 2.4.4 with the following main changes :
    - BUG/MEDIUM: h2: match absolute-path not path-absolute for :path
    - REGTESTS: http_upgrade: fix incorrect expectation on TCP->H1->H2
    - REGTESTS: abortonclose: after retries, 503 is expected, not close
    - MINOR: hlua: take the global Lua lock inside a global function
    - BUG/MINOR: stick-table: fix the sc-set-gpt* parser when using expressions
    - BUG/MEDIUM: base64: check output boundaries within base64{dec,urldec}
    - BUG/MINOR: base64: base64urldec() ignores padding in output size check
    - MINOR: compiler: implement an ONLY_ONCE() macro
    - BUG/MINOR: lua: use strlcpy2() not strncpy() to copy sample keywords
    - BUG/MINOR: time: fix idle time computation for long sleeps
    - MINOR: time: add report_idle() to report process-wide idle time
    - BUG/MINOR: ebtree: remove dependency on incorrect macro for bits per long
    - BUG/MINOR threads: Use get_(local|gm)time instead of (local|gm)time
    - BUG/MINOR: tools: Fix loop condition in dump_text()
    - CLEANUP: Add missing include guard to signal.h
    - BUG/MINOR: vars: fix set-var/unset-var exclusivity in the keyword parser
    - DOC: configuration: remove wrong tcp-request examples in tcp-response
    - BUG/MINOR: config: reject configs using HTTP with bufsize >= 256 MB
    - CLEANUP: htx: remove comments about "must be < 256 MB"
    - BUG/MAJOR: htx: fix missing header name length check in htx_add_header/trailer
    - Revert "BUG/MINOR: stream-int: Don't block reads in si_update_rx() if chn may receive"
diff --git a/VERDATE b/VERDATE
index 114c5dd..503234f 100644
--- a/VERDATE
+++ b/VERDATE
@@ -1,2 +1,2 @@
 $Format:%ci$
-2021/08/17
+2021/09/07