Release v2.7.0

This version is based on Valgrind-3.26.0.

### Added
	- Added verrou_dd_back to perform delta-debugging with the backtrace search space.
	- Enabled chaining of all verrou_dd_* with post_verrou_dd.
	- Improved delta-debugging parallelism.
	- Improved delta-debugging progress reporting.
	- Added delta-debugging cache cleanup triggered on keyboard interruption (e.g., Ctrl‑C).
	- Added a practical summary to delta-debugging tools.
	- Integrated VPREC (many thanks to Yohan Chatelain and the Verificarlo team).
	- Improved performance of verrou_dd_stdout thanks to the new IOMatch key permutable-bmatch-indexes.
	- Added a FAQ section to the documentation.
	- Added counters for operations involving subnormal numbers.
	- Added a --enable-verrou-optim=no configure flag to reduce memory usage during compilation.
	- Added daz/dazftz rounding modes.
	- Added an unfused FMA option.

### Changed
	- Updated GPL and LGPL to version 3 to match the Valgrind license.
	- Marked average and average_[[[s]com]det] rounding modes as deprecated.
	- Renamed average and average_[[[s]com]det] rounding modes to nearness and nearness_[[[s]com]det].
	- Various bug fixes.

Author: lathuili

CHANGELOG.md

@@ -1,4 +1,4 @@
-## [UNRELEASED]
+## v2.7.0 - 2026-03-24
 
 This version is based on Valgrind-3.26.0.
 

README.md

@@ -27,6 +27,15 @@ documentation generation is required (see below).
 
 Documentation and support can also be found in the [verrou_support repository](https://github.com/edf-hpc/verrou_support).
 
+<p>&nbsp</p>
+
+**NB:** This is released version 2.7.0 of Verrou, based on Valgrind v3.26.0. The
+development version of Verrou can always be found in the
+[`master`](https://github.com/edf-hpc/verrou/) branch. For other versions,
+please consult the list of
+[releases](https://github.com/edf-hpc/verrou/releases).
+
+
 ## Installation
 
 ### Get the sources

valgrind.diff

@@ -63,7 +63,7 @@ index b86e80220..f67bafdf1 100755
  m4_define([v_minor_ver], [26])
  m4_define([v_micro_ver], [0])
 -m4_define([v_suffix_ver], [])
-+m4_define([v_suffix_ver], [verrou-dev])
++m4_define([v_suffix_ver], [verrou-2.7.0])
  m4_define([v_rel_date], ["24 Oct 2025"])
  m4_define([v_version],
  	  m4_if(v_suffix_ver, [],