Implement "make check" for zenmap

Currently, this just uses Python's unittest module to autodiscover
tests, which may skip some, but is better than nothing. TODO: move tests
to their own module and let the zenmap_check target test them directly.

Makefile.in

@@ -394,7 +394,10 @@ ncat_check:
 nsock_check:
 	@cd $(NSOCKDIR)/src && $(MAKE) check
 
-check: @NCAT_CHECK@ @NSOCK_CHECK@
+zenmap_check:
+	@cd $(ZENMAPDIR) && $(PYTHON) -m unittest discover build/lib.* '*.py'
+
+check: @NCAT_CHECK@ @NSOCK_CHECK@ @ZENMAP_CHECK@
 
 ${srcdir}/configure: configure.ac 
 	cd ${srcdir} && autoconf

configure

@@ -681,6 +681,7 @@ NPINGDIR
 subdirs
 ZENMAP_DIST_CLEAN
 ZENMAP_CLEAN
+ZENMAP_CHECK
 UNINSTALLZENMAP
 INSTALLZENMAP
 BUILDZENMAP
@@ -5953,12 +5954,14 @@ if test "$with_zenmap" = "no"; then
   BUILDZENMAP=""
   INSTALLZENMAP=""
   UNINSTALLZENMAP=""
+  ZENMAP_CHECK=""
   ZENMAP_CLEAN=""
   ZENMAP_DIST_CLEAN=""
 else
   BUILDZENMAP=build-zenmap
   INSTALLZENMAP=install-zenmap
   UNINSTALLZENMAP=uninstall-zenmap
+  ZENMAP_CHECK=zenmap_check
   ZENMAP_CLEAN=zenmap_clean
   ZENMAP_DIST_CLEAN=zenmap_dist_clean
 fi
@@ -5969,6 +5972,7 @@ fi
 
 
 
+
 NPINGDIR=nping
 
 # Do they want Nping?

configure.ac

@@ -250,12 +250,14 @@ if test "$with_zenmap" = "no"; then
   BUILDZENMAP=""
   INSTALLZENMAP=""
   UNINSTALLZENMAP=""
+  ZENMAP_CHECK=""
   ZENMAP_CLEAN=""
   ZENMAP_DIST_CLEAN=""
 else
   BUILDZENMAP=build-zenmap
   INSTALLZENMAP=install-zenmap
   UNINSTALLZENMAP=uninstall-zenmap
+  ZENMAP_CHECK=zenmap_check
   ZENMAP_CLEAN=zenmap_clean
   ZENMAP_DIST_CLEAN=zenmap_dist_clean
 fi
@@ -263,6 +265,7 @@ AC_SUBST(ZENMAPDIR)
 AC_SUBST(BUILDZENMAP)
 AC_SUBST(INSTALLZENMAP)
 AC_SUBST(UNINSTALLZENMAP)
+AC_SUBST(ZENMAP_CHECK)
 AC_SUBST(ZENMAP_CLEAN)
 AC_SUBST(ZENMAP_DIST_CLEAN)