Makefile.am: cockpit_enable_python was dropped

The Python bridge is now default enabled in 14c07d7 and
this also removed cockpit_enable_python in favour of explicitly enabling
the old bridge. As RHEL 8 ships the old bridge by default we need to
toggle this for the pybridge scenario.

Makefile.am

@@ -37,7 +37,7 @@ distdir: $(DISTFILES)
 	sed -i "s/[@]VERSION@/$(VERSION)/" "$(distdir)/src/client/org.cockpit_project.CockpitClient.metainfo.xml"
 	$(srcdir)/tools/fix-spec $(distdir)/tools/cockpit.spec $(VERSION)
 	test -z '$(HACK_SPEC_FOR_PYTHON)' || \
-		sed -i 's/\(define cockpit_enable_python\) 0/\1 1/' $(distdir)/tools/cockpit.spec
+		sed -i 's/\(define enable_old_bridge\) 1/\1 0/' $(distdir)/tools/cockpit.spec
 	sed -i "/^pkgver=/ s/0/$(VERSION)/" "$(distdir)/tools/arch/PKGBUILD"
 	sed -i "1 s/0/$(VERSION)/" "$(distdir)/tools/debian/changelog"
 	cp -r "$(srcdir)/dist" "$(distdir)"

tools/cockpit.spec

@@ -54,7 +54,7 @@ Release:        1%{?dist}
 Source0:        https://github.com/cockpit-project/cockpit/releases/download/%{version}/cockpit-%{version}.tar.xz
 
 # Don't change the bridge in the RHEL 8; the old SSH breaks some features, see @todoPybridgeRHEL8
-%if 0%{?rhel} == 8
+%if 0%{?rhel} == 8 && !%{defined enable_old_bridge}
 %define enable_old_bridge 1
 %endif