Snippets for gambit-c 4.9.5 from Alpine riscv64

Sourced from https://build.alpinelinux.org/buildlogs/build-edge-riscv64/testing/gambit/gambit-4.9.5-r1.log.

• os_io.c:4294:15: warning: 'PEM_read_DHparams' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
   4294 |               dh = PEM_read_DHparams (dh_fp, NULL, NULL, NULL);
        |               ^~
  

• os_io.c:4301:15: warning: 'DH_check' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
   4301 |               DH_check (dh, &err);
        |               ^~~~~~~~
  

• os_io.c:4311:15: warning: 'DH_new' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
   4311 |               dh = DH_new();
        |               ^~
  

• os_io.c:4323:19: warning: 'DH_free' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
   4323 |                   DH_free (dh);
        |                   ^~~~~~~
  

• os_io.c:4329:11: warning: 'DH_set0_pqg' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
   4329 |           DH_set0_pqg(dh,bp,NULL,bg);
        |           ^~~~~~~~~~~
  

• os_io.c:4339:13: warning: 'DH_free' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
   4339 |             DH_free (dh);
        |             ^~~~~~~
  

• os_io.c:4369:11: warning: 'EC_KEY_new_by_curve_name' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
   4369 |           ecdh = EC_KEY_new_by_curve_name(nid);
        |           ^~~~
  

• os_io.c:4379:11: warning: 'EC_KEY_free' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
   4379 |           EC_KEY_free (ecdh);
        |           ^~~~~~~~~~~