Make it possible to do

	import vmod from "/some/dir/"

and have the default vmod shlib filename appended.

bin/varnishtest/tests/m00008.vtc

@@ -23,3 +23,11 @@ varnish v1 -cliok "param.set vmod_dir /nowhere:${topbuild}/lib/libvmod_std/.libs
 varnish v1 -vcl+backend {
 	import std;
 }
+
+varnish v1 -cliok "param.set vcc_unsafe_path on"
+
+varnish v1 -cliok "param.set vmod_dir /nowhere:/else"
+
+varnish v1 -vcl+backend {
+	import std from "${topbuild}/lib/libvmod_std/.libs/";
+}

bin/varnishtest/tests/v00046.vtc

@@ -67,7 +67,7 @@ varnish v1 -errvcl {Found: 'zool' at} {
 shell "rm -f ${tmpdir}/a"
 shell "rm -f ${tmpdir}/_start.vcl"
 
-varnish v1 -errvcl {only works in nested VCL include files} {
+varnish v1 -errvcl {needs absolute filename of including file.} {
 	include "./foobar";
 }
 

lib/libvcc/vcc_compile.c

@@ -511,8 +511,8 @@ vcc_resolve_includes(struct vcc *tl)
 			 */
 			if (t1->src->name[0] != '/') {
 				VSB_printf(tl->sb,
-				    "include \"./xxxxx\"; only works in "
-				    "nested VCL include files\n");
+				    "include \"./xxxxx\"; needs absolute "
+				    "filename of including file.\n");
 				vcc_ErrWhere(tl, t1);
 				return;
 			}
@@ -784,14 +784,14 @@ VCC_Compile(const struct vcp *vcp, struct vsb *sb,
 {
 	struct source *sp;
 	char *r;
+	CHECK_OBJ_NOTNULL(vcp, VCP_MAGIC);
+	AN(sb);
+	AN(vclsrcfile);
 
-	if (vclsrc != NULL) {
-		AZ(vclsrcfile);
-		sp = vcc_new_source(vclsrc, NULL, "<input>");
-	} else {
-		AN(vclsrcfile);
+	if (vclsrc != NULL)
+		sp = vcc_new_source(vclsrc, NULL, vclsrcfile);
+	else
 		sp = vcc_file_source(vcp, sb, vclsrcfile);
-	}
 	if (sp == NULL)
 		return (NULL);
 	r = vcc_CompileSource(vcp, sb, sp);

lib/libvcc/vcc_vmod.c

@@ -117,7 +117,11 @@ vcc_ParseImport(struct vcc *tl)
 			return;
 		}
 		ExpectErr(tl, CSTR);
-		bprintf(fn, "%s", tl->t->dec);
+		p = strrchr(tl->t->dec, '/');
+		if (p != NULL && p[1] == '\0')
+			bprintf(fn, "%slibvmod_%.*s.so", tl->t->dec, PF(mod));
+		else
+			bprintf(fn, "%s", tl->t->dec);
 		vcc_NextToken(tl);
 	} else {
 		bprintf(fn, "libvmod_%.*s.so", PF(mod));