Ignore completely bogus GCC 11 warnings.

Various varieties of this:

           |   45 |   tempfile = strdup ("/tmp/luksXXXXXX");
           |      |              ~~~~~~~~~~~~~~~~~~~~~~~~~~
           |      |              |
           |      |              (19) this call could return NULL
           |   46 |   if (!tempfile) {
           |      |      ~
           |      |      |
           |      |      (20) following 'false' branch (when 'tempfile' is non-NULL)...
           |......
           |   51 |   fd = mkstemp (tempfile);
           |      |   ~~   ~~~~~~~~~~~~~~~~~~
           |      |   |    |
           |      |   |    (22) argument 1 ('tempfile') from (19) could be NULL where non-null expected
           |      |   (21) ...to here

daemon/luks.c

@@ -34,6 +34,8 @@ optgroup_luks_available (void)
   return prog_exists ("cryptsetup");
 }
 
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wanalyzer-possible-null-argument"
 /* Callers must also call remove_temp (tempfile). */
 static char *
 write_key_to_temp (const char *key)
@@ -73,6 +75,7 @@ write_key_to_temp (const char *key)
   free (tempfile);
   return NULL;
 }
+#pragma GCC diagnostic pop
 
 static void
 remove_temp (char *tempfile)

daemon/ntfsclone.c

@@ -30,6 +30,8 @@
 #include "actions.h"
 #include "optgroups.h"
 
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wanalyzer-null-argument"
 /* Read the error file.  Returns a string that the caller must free. */
 static char *
 read_error_file (char *error_file)
@@ -51,6 +53,7 @@ read_error_file (char *error_file)
 
   return str;                   /* caller frees */
 }
+#pragma GCC diagnostic pop
 
 static int
 write_cb (void *fd_ptr, const void *buf, size_t len)

df/main.c

@@ -313,6 +313,8 @@ main (int argc, char *argv[])
   exit (err == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
 }
 
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wanalyzer-null-argument"
 /* Generate a display name for the single guest mode.  See comments in
  * https://bugzilla.redhat.com/show_bug.cgi?id=880801
  */
@@ -370,6 +372,7 @@ single_drive_display_name (struct drv *drvs)
 
   return name;
 }
+#pragma GCC diagnostic pop
 
 static char *
 make_display_name (struct drv *drvs)

format/format.c

@@ -302,6 +302,8 @@ main (int argc, char *argv[])
   exit (EXIT_SUCCESS);
 }
 
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wanalyzer-null-argument"
 /* Parse lvm string of the form "/dev/VG/LV" or "VG/LV".
  * This sets the global variables 'vg' and 'lv', or exits on failure.
  */
@@ -327,6 +329,7 @@ parse_vg_lv (const char *lvm)
   if (strchr (vg, '/') || strchr (lv, '/'))
     goto cannot_parse;
 }
+#pragma GCC diagnostic pop
 
 /* Returns 0 on success, 1 if we need to retry. */
 static int