Snippets for dovecot 2.4.4 from Fedora s390x

Sourced from https://kojipkgs.fedoraproject.org/packages/dovecot/2.4.4/6.fc45/data/logs/s390x/build.log.

• hmac.c:268:40: warning: initialization discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
    268 |                 unsigned char *error = t_strdup_printf("%s", ERR_error_string(ec, NULL));
        |                                        ^~~~~~~~~~~~~~~
  

• printf-format-fix.c:100:30: warning: assignment discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
    100 |                        (flag = strchr(printf_flags, *p)) != NULL) {
        |                              ^
  

• test-var-expand.c:582:55: warning: 'ncpus' may be used uninitialized [-Wmaybe-uninitialized]
    582 |                 { .in = "%{system:cpu_count}", .out = dec2str(ncpus), .ret = ret },
        |                                                       ^
  

• iostream-openssl.c:95:17: warning: assignment discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
     95 |         subject = X509_get_subject_name(X509_STORE_CTX_get_current_cert(ctx));
        |                 ^
  

• iostream-openssl-context.c:262:31: warning: assignment discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
    262 |                         xname = X509_get_subject_name(itmp->x509);
        |                               ^
  

• test-auth-cache.c:126:21: warning: 'error' may be used uninitialized [-Wmaybe-uninitialized]
    126 |                 if (strstr(error, "$end") != NULL) {
        |                     ^