Revive updateVersions.pl with `make update-versions`.

Makefile.am

@@ -122,6 +122,10 @@ check-changes:
 		$(PYTHON) $(top_srcdir)/scripts/maint/lintChanges.py $(top_srcdir)/changes/*; \
 		fi
 
+.PHONY: update-versions
+update-versions:
+	$(PERL) $(top_builddir)/scripts/maint/updateVersions.pl
+
 version:
 	@echo "Tor @VERSION@"
 	@if test -d "$(top_srcdir)/.git" && test -x "`which git 2>&1;true`"; then \

configure.ac

@@ -1664,6 +1664,7 @@ AC_CONFIG_FILES([
         src/config/torrc.sample
         src/config/torrc.minimal
         scripts/maint/checkOptionDocs.pl
+        scripts/maint/updateVersions.pl
 ])
 
 if test x$asciidoc = xtrue && test "$ASCIIDOC" = "none" ; then

scripts/maint/updateVersions.pl → scripts/maint/updateVersions.pl.in

@@ -1,8 +1,8 @@
 #!/usr/bin/perl -w
 
-$CONFIGURE_IN = './configure.ac';
-$ORCONFIG_H = './src/win32/orconfig.h';
-$TOR_NSI = './contrib/win32build/tor-mingw.nsi.in';
+$CONFIGURE_IN = '@abs_top_srcdir@/configure.ac';
+$ORCONFIG_H = '@abs_top_srcdir@/src/win32/orconfig.h';
+$TOR_NSI = '@abs_top_srcdir@/contrib/win32build/tor-mingw.nsi.in';
 
 $quiet = 1;