Use nl_langinfo() for month and day names

Use the locale setting to fetch the month names and abbreviated day
names.

Signed-off-by: Lars Henriksen <LarsHenriksen@get2net.dk>
Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>

src/vars.c

@@ -71,36 +71,10 @@ int want_reload = 0;
 const char *datefmt_str[DATE_FORMATS];
 
 /*
- * variables to store calendar names
+ * variable to store month lengths
  */
 int days[12] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
 
-const char *monthnames[12] = {
-	N_("January"),
-	N_("February"),
-	N_("March"),
-	N_("April"),
-	N_("May"),
-	N_("June"),
-	N_("July"),
-	N_("August"),
-	N_("September"),
-	N_("October"),
-	N_("November"),
-	N_("December")
-};
-
-const char *daynames[8] = {
-	N_("Sun"),
-	N_("Mon"),
-	N_("Tue"),
-	N_("Wed"),
-	N_("Thu"),
-	N_("Fri"),
-	N_("Sat"),
-	N_("Sun")
-};
-
 /*
  * variables to store data path names, which are initialized in
  * io_init()