build: modernize bootstrap prerequsite tools

Following on from commit v9.0-15-gaa31b919c
which updated README-prereq...

* bootstrap.conf: Add an explicit requirement on m4.
Add an explicit requirement on texi2pdf which is often
packaged separately to makeinfo and induces a failure
far down the distribution phase if not present.
Replace the rsync dependency with wget,
which gnulib changed to in 2018.

diff --git a/bootstrap.conf b/bootstrap.conf
index 7ab5f58955e2f473a239a1bf95256c36d26f7463..238f68dc7e5c2e1d51f6b269e02c45a3806c5bb2 100644 (file)
--- a/bootstrap.conf
+++ b/bootstrap.conf
@@ -364,11 +364,13 @@ gettext    0.19.2
 git        1.4.4
 gperf      -
 gzip       -
+m4         -
 makeinfo   6.1
+texi2pdf   6.1
 patch      -
 perl       5.5
-rsync      -
 tar        -
+wget       -
 xz         -
 "