Merge quagga mainline into the google ISIS code.

The steps were:

  $ git checkout google-is-is
  $ git merge quagga
  $ git checkout google-is-is -- isisd

  # Resolve conflicts in the following:
  lib/md5.h
  zebra/rt_netlink.c
  zebra/zebra_rib.c
  zebra/zserv.c

Note that the content in the isisd directory is left unchanged in the
merge. As a result, changes made to isisd as part of the following
commits on the quagga mainline are dropped.

  # 8ced4e82 is the merge base, e96b3121 is the current quagga master
  $ git log --oneline --reverse 8ced4e82..e96b3121 -- isisd
  5574999 isisd: fix crash on "no router isis" (BZ#536)
  8998075 isisd: raise hello rate for DIS (BZ#539)
  306ca83 isisd: include hash.h, not hash.c
  b82cdeb delete CVS keywords
  2f65867 isisd: indent longopts array
  b511468 quagga: option "-z" ("--socket <path>") added
  05e54ee build: delete .cvsignore files
  b4e45f6 fix zebra protocol after MP-BGP changes
  7fd6cd8 isisd: fix circuit state machine
  907fd95 isisd: send proper LSP after DIS election
  d034aa0 isisd: fix wrong next-hops from SPF
  c25eaff isisd: unexpected kernel routing table (BZ#544)
  e6b03b7 isisd: implement MD5 circuit authentication

1 files changed, 3 insertions, 4 deletions

diff --git a/lib/smux.c b/lib/smux.c
index 1941cf8c..b7cd18d1 100644
--- a/lib/smux.c
+++ b/lib/smux.c
@@ -270,7 +270,6 @@ static void
 smux_getresp_send (oid objid[], size_t objid_len, long reqid, long errstat,
 		   long errindex, u_char val_type, void *arg, size_t arg_len)
 {
-  int ret;
   u_char buf[BUFSIZ];
   u_char *ptr, *h1, *h1e, *h2, *h2e;
   size_t len, length;
@@ -326,7 +325,7 @@ smux_getresp_send (oid objid[], size_t objid_len, long reqid, long errstat,
   if (debug_smux)
     zlog_debug ("SMUX getresp send: %td", (ptr - buf));
   
-  ret = send (smux_sock, buf, (ptr - buf), 0);
+  send (smux_sock, buf, (ptr - buf), 0);
 }
 
 static u_char *
@@ -946,7 +945,7 @@ smux_open (int sock)
   u_char *ptr;
   size_t len;
   long version;
-  u_char progname[] = QUAGGA_PROGNAME "-" QUAGGA_VERSION;
+  const char progname[] = QUAGGA_PROGNAME "-" QUAGGA_VERSION;
 
   if (debug_smux)
     {
@@ -977,7 +976,7 @@ smux_open (int sock)
   ptr = asn_build_string (ptr, &len, 
 			  (u_char)
 			  (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OCTET_STR),
-			  progname, strlen (progname));
+			  (const u_char *) progname, strlen (progname));
 
   /* SMUX connection password. */
   ptr = asn_build_string (ptr, &len,