Snippets for bird 3.4.0 from Nix aarch64-linux

Sourced from https://hydra.nixos.org/log/v8ckwvs9kqxk0jyazvl9vdqpzkha3r18-bird-3.4.0.drv.

• ./lib/string.h:50:13: warning: initialization discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
     50 |   char *s = strrchr(str, '/');
        |             ^~~~~~~
  

• lib/ip.c:365:19: warning: initialization discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
    365 |     char *d, *c = strchr(a, '.');
        |                   ^~~~~~
  

• lib/mslab.c:1178:8: warning: variable 'pti' set but not used [-Wunused-but-set-variable=]
   1178 |   uint pti = 0;
        |        ^~~
  

• nest/rt-table.c:2234:8: warning: variable 'cleared_counter' set but not used [-Wunused-but-set-variable=]
   2234 |   uint cleared_counter = 0;
        |        ^~~~~~~~~~~~~~~
  

• nest/rt-table.c:4832:8: warning: variable 'total' set but not used [-Wunused-but-set-variable=]
   4832 |   uint total = 0;
        |        ^~~~~
  

• proto/bgp/bgp.c:3503:55: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare]
   3503 |   if ((cf->send_hold_time > 0) && (cf->send_hold_time < cf->hold_time))
        |                                                       ^
  

• proto/bgp/packets.c:2301:97: warning: parameter 'size' set but not used [-Wunused-but-set-parameter=]
   2301 | bgp_encode_evpn_ead(struct bgp_write_state *s UNUSED, const net_addr_evpn *net, byte *buf, uint size)
        |                                                                                            ~~~~~^~~~
  

• proto/bridge/bridge.c:944:42: warning: initializer-string for array of 'char' truncates NUL terminator but destination lacks 'nonstring' attribute (5 chars into 4 available) [-Wunterminated-string-initialization]
    944 | const char kbr_src_abbrev[KBR_SRC_MAX] = "BLSD";
        |                                          ^~~~~~
  

• sysdep/unix/alloc.c:247:12: warning: 'fp' is used uninitialized [-Wuninitialized]
    247 |   if (fp = alloc_hot_page(fp))
        |            ^~~~~~~~~~~~~~~~~~
  

• sysdep/unix/io.c:2266:3: warning: 'ssh_channel_select' is deprecated [-Wdeprecated-declarations]
   2266 |   if (ssh_channel_select(rchans, NULL, NULL, &timev) == SSH_EINTR)
        |   ^~
  

• sysdep/unix/io.c:209:5: warning: ignoring return value of 'write' declared with attribute 'warn_unused_result' [-Wunused-result]
    209 |     write(r->fd, buf, sz);
        |     ^~~~~~~~~~~~~~~~~~~~~