Snippets for lbdb 0.41 from Fedora s390x

Sourced from https://kojipkgs.fedoraproject.org/packages/lbdb/0.41/24.fc45/data/logs/s390x/build.log.

• fetchaddr.c:166:7: warning: ‘strncpy’ output truncated before terminating nul copying as many bytes from a string as its length [-Wstringop-truncation]
    166 |       strncpy (hdr[i].tag, fieldname, strlen (fieldname));
        |       ^
  

• dotlock.c:434:5: warning: ignoring return value of ‘link’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
    434 |     link (nfslockfile, lockfile);
        |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
  

• helpers.h:44:24: warning: ‘strncpy’ output may be truncated copying 255 bytes from a string of length 255 [-Wstringop-truncation]
     44 | #define strfcpy(A,B,C) strncpy(A,B,C), *(A+(C)-1)=0
        |                        ^~~~~~~