Sync with 'master'

Documentation/RelNotes/2.54.0.adoc

@@ -210,6 +210,8 @@ Performance, Internal Implementation, Development Support etc.
    mnemonic notation for certain control characters like "\t", instead
    of octal notation like "\011".
 
+ * Adjust test-lint to allow "sed -E" to use ERE in the patterns.
+
 
 Fixes since v2.53
 -----------------
@@ -344,6 +346,18 @@ Fixes since v2.53
    work better with SHA-256 as well as SHA-1.
    (merge 30310f3cc4 ss/t3200-test-zero-oid later to maint).
 
+ * Instead of hardcoded 'origin', use the configured default remote
+   when fetching from submodules.
+   (merge 3b5fb32da8 ng/submodule-default-remote later to maint).
+
+ * The code in "git help" that shows configuration items in sorted
+   order was awkwardly organized and prone to bugs.
+
+ * "imap-send" used to use functions whose use is going to be removed
+   with OpenSSL 4.0; rewrite them using public API that has been
+   available since OpenSSL 1.1 since 2016 or so.
+   (merge 6392a0b75d bb/imap-send-openssl-4.0-prep later to maint).
+
  * Other code cleanup, docfix, build fix, etc.
    (merge d79fff4a11 jk/remote-tracking-ref-leakfix later to maint).
    (merge 7a747f972d dd/t5403-modernise later to maint).
@@ -385,3 +399,5 @@ Fixes since v2.53
    (merge 4c223571be ty/patch-ids-document-lazy-eval later to maint).
    (merge 476365ac85 jc/doc-wholesale-replace-before-next later to maint).
    (merge 35f220b639 ss/submodule--helper-use-xmalloc later to maint).
+   (merge 02cbae61df cf/constness-fixes later to maint).
+   (merge 69efd53c81 ms/t7605-test-path-is-helpers later to maint).