lvm2: make manpage generation reproducible (#438549)

pkgs/os-specific/linux/lvm2/common.nix

@@ -144,6 +144,8 @@ stdenv.mkDerivation rec {
       }
     ))
     ./fix-stdio-usage.patch
+    # https://gitlab.com/lvmteam/lvm2/-/merge_requests/33
+    ./fix-manpage-reproducibility.patch
   ];
 
   doCheck = false; # requires root

pkgs/os-specific/linux/lvm2/fix-manpage-reproducibility.patch

@@ -0,0 +1,31 @@
+commit 950f219ed287358df8c128f7e22989177a8de47c
+Author: Arnout Engelen <arnout@bzzt.net>
+Date:   Mon Aug 25 15:55:44 2025 +0200
+
+    man: simplify vmautoactivation(7)
+    
+    Previously this was hard-coded to: "Autoactivation commands use a number
+    of temp files in /run/lvm (with the expectation that /run is cleared
+    between boots.)"
+    
+    Since c1bfc8737f08bf7558b2d788e9756f895cd9eaaa it was made more generic,
+    but on some systems this logic leads to "Autoactivation commands use a
+    number of temp files in /run/lvm (with the expectation that /var/run
+    is cleared between boots)." which I'd say adds more confusion than it
+    solves.
+
+diff --git a/man/lvmautoactivation.7_main b/man/lvmautoactivation.7_main
+index e55943b29..9d429055c 100644
+--- a/man/lvmautoactivation.7_main
++++ b/man/lvmautoactivation.7_main
+@@ -175,9 +175,7 @@ is reserved for udev output.)
+ .
+ Autoactivation commands use a number of temp files in
+ .I #DEFAULT_RUN_DIR#
+-(with the expectation that
+-.I #DEFAULT_PID_DIR#
+-is cleared between boots).
++(with the expectation that it is cleared between boots).
+ .
+ .TP
+ .B pvs_online