Reproducable builds: remove __DATE__/__TIME__

So that reproducible builds are possible, remove __DATE__/__TIME__
macros from the code.

It's not clear who the original author(s) of this patch are, but it's
not originally authored by me (Thomas Adam), but is most definitely a
good idea.

Fixes #99

fvwm/fvwm3.c

@@ -1261,8 +1261,7 @@ static void setVersionInfo(void)
 	int support_len;
 
 	/* Set version information string */
-	sprintf(version_str, "fvwm3 %s (%s) compiled on %s at %s",
-		VERSION, VERSIONINFO, __DATE__, __TIME__);
+	sprintf(version_str, "fvwm3 %s (%s)", VERSION, VERSIONINFO);
 	Fvwm_VersionInfo = fxstrdup(version_str);
 
 	sprintf(license_str,

fvwm/session.c

@@ -138,7 +138,7 @@ static char *get_version_string(void)
 {
 	/* migo (14-Mar-2001): it is better to manually update a version string
 	 * in the stable branch, otherwise saving sessions becomes useless */
-	return CatString3(VERSION, ", ", __DATE__);
+	return CatString3(VERSION, ", ", " ");
 	/* return "2.6-0"; */
 }