Support stacking for account management as well as for session setup.

diff -upk.orig Linux-PAM-0.99.2.1.orig/modules/pam_limits/pam_limits.c Linux-PAM-0.99.2.1/modules/pam_limits/pam_limits.c
--- Linux-PAM-0.99.2.1.orig/modules/pam_limits/pam_limits.c	2005-09-21 13:35:29 +0000
+++ Linux-PAM-0.99.2.1/modules/pam_limits/pam_limits.c	2005-12-26 20:42:27 +0000
@@ -672,14 +672,24 @@ pam_sm_close_session (pam_handle_t *pamh
 }
 
 #ifdef PAM_STATIC
+#define pam_sm_acct_mgmt pam_sm_open_session
+#elif defined(__linux__) && defined(__ELF__)
+__asm__(".globl pam_sm_acct_mgmt; pam_sm_acct_mgmt = pam_sm_open_session");
+#else
+PAM_EXTERN int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
+	int argc, const char **argv)
+{
+	return pam_sm_open_session(pamh, flags, argc, argv);
+}
+#endif
 
+#ifdef PAM_STATIC
 /* static module data */
-
 struct pam_module _pam_limits_modstruct = {
      "pam_limits",
      NULL,
      NULL,
-     NULL,
+     pam_sm_acct_mgmt,
      pam_sm_open_session,
      pam_sm_close_session,
      NULL