* Make really sure that we use bash. The line

NEED_PROG(shell, bash)

  actually uses the content of $shell if set, which often points at
  /bin/sh.

configure.ac

@@ -124,7 +124,7 @@ fi
 ])
 
 NEED_PROG(curl, curl)
-NEED_PROG(shell, bash)
+NEED_PROG(bash, bash)
 NEED_PROG(patch, patch)
 AC_PATH_PROG(xmllint, xmllint, false)
 AC_PATH_PROG(xsltproc, xsltproc, false)

substitute.mk

@@ -9,7 +9,7 @@
 	 -e "s^@libexecdir\@^$(libexecdir)^g" \
 	 -e "s^@storedir\@^$(storedir)^g" \
 	 -e "s^@system\@^$(system)^g" \
-	 -e "s^@shell\@^$(shell)^g" \
+	 -e "s^@shell\@^$(bash)^g" \
 	 -e "s^@curl\@^$(curl)^g" \
 	 -e "s^@bzip2\@^$(bzip2_bin)/bzip2^g" \
 	 -e "s^@bunzip2\@^$(bzip2_bin)/bunzip2^g" \