Revision 1698875

Follow-up to r1337: Fix compilation of auth/auth_kerb_gss.c on *nix.

* auth/auth_kerb_gss.c
  (): Include gssapi.h and stdlib.h for malloc.
  (serf__spnego_context_t): Rename to serf__kerb_context_t.
  (serf__spnego_init_sec_context): Rename to serf__kerb_init_sec_context.
  (serf__kerb_init_sec_context): Remove unused variable and fix types ctx_p, 
   input_buf and output_buf parameters.
  (serf__kerb_release_buffer, serf__kerb_delete_sec_context): Fix parameter 
   type.
* serfmake
  (LIB_FILES): Add auth/auth_kerb_gss.c to compilation list.