Move po/sympa/xgettext.pl into support/ directory:

It will never be distributed with source tarball.

po/sympa/Makevars

@@ -8,7 +8,7 @@ subdir = po/sympa
 top_builddir = ../..
 
 # Sympa uses xgettext by their own.
-XGETTEXT = $(top_srcdir)/$(subdir)/xgettext.pl
+XGETTEXT = $(top_srcdir)/support/xgettext.pl
 # These options get passed to xgettext.
 XGETTEXT_OPTIONS =
 

po/web_help/Makevars

@@ -8,7 +8,7 @@ subdir = po/web_help
 top_builddir = ../..
 
 # Sympa uses xgettext by their own.
-XGETTEXT = $(top_srcdir)/po/sympa/xgettext.pl
+XGETTEXT = $(top_srcdir)/support/xgettext.pl
 # These options get passed to xgettext.
 XGETTEXT_OPTIONS = -t helploc
 

support/README.support.md

@@ -23,3 +23,54 @@ make POD2MAN="POD2MDOUTPUT=directory pod2md"
 ```
 then, generated texts will be saved in _directory_.
 
+### xgettext.pl
+
+The xgettext(1) utility specific to Sympa. Typically invoked by automated
+processes updating translation catalog.
+
+How to prepare a new source tarball
+===================================
+
+  1. Checkout "main" branch.
+     ```
+     $ git checkout sympa-6.2
+     ```
+
+  2. Update translation catalog.
+     ```
+     $ cd (top)/po/sympa; make clean sympa.pot-update update-po
+     $ cd (top)/po/web_help; make clean web_help.pot-update update-po
+     ```
+
+     And commit and push the changes.
+
+  3. Update configure.ac and NEWS.md.
+
+     And commit and push the changes.
+
+  4. Cleanup everything.
+     ```
+     $ cd (top)
+     $ make distclean
+     $ rm -Rf autom4te.cache/
+     ```
+
+     And sync with repository.
+     ```
+     $ git pull
+     $ support/git-set-file-times
+     ```
+
+  5. Configure, create and check distribution.
+     ```
+     $ autoreconf -i
+     $ ./configure --enable-fhs --with-confdir=/etc/sympa
+     $ make distcheck
+     ```
+
+  6. Upload generated files:
+
+       - sympa-VERSION.tar.gz
+       - sympa-VERSION.tar.gz.md5
+       - sympa-VERSION.tar.gz.sha256
+