Add gnulib modules calloc-posix, malloc-posix, realloc-posix

* autogen.sh: Add gnulib modules calloc-posix, malloc-posix, realloc-posix
* configure.ac: Remove two comment lines
* libwget/xalloc.c: Remove rpl_malloc() and rpl_realloc()

autogen.sh

@@ -35,6 +35,7 @@ accept
 bind
 c-strcase
 c-ctype
+calloc-posix
 clock-time
 close
 connect
@@ -51,6 +52,7 @@ glob
 iconv
 inttypes
 listen
+malloc-posix
 nanosleep
 netdb
 netinet_in
@@ -60,6 +62,7 @@ poll
 pwrite
 qsort_r
 read
+realloc-posix
 send
 sendto
 servent

configure.ac

@@ -364,9 +364,7 @@ AC_C_INLINE
 
 # Checks for library functions.
 AC_FUNC_FORK
-#AC_FUNC_MALLOC
 AC_FUNC_MMAP
-#AC_FUNC_REALLOC
 AC_CHECK_FUNCS([\
  memchr memmove memset mkdir munmap strchr strerror strrchr strstr strlcpy vasprintf])
 

libwget/xalloc.c

@@ -139,13 +139,3 @@ void *wget_realloc(void *ptr, size_t size)
 		*p = NULL;
 	}
 }*/
-
-void *rpl_malloc (size_t n)
-{
-	return malloc (n ? n : 1);
-}
-
-void *rpl_realloc (void *ptr, size_t n)
-{
-	return realloc (ptr, n ? n : 1);
-}