Snippets for apache-serf 1.3.10 from Alpine s390x

Sourced from https://build.alpinelinux.org/buildlogs/build-edge-s390x/main/serf/serf-1.3.10-r0.log.

• buckets/headers_buckets.c:363:8: warning: 'avail' may be used uninitialized [-Wmaybe-uninitialized]
    363 |     if (requested >= avail) {
        |        ^
  

• buckets/headers_buckets.c:429:39: warning: 'data' may be used uninitialized [-Wmaybe-uninitialized]
    429 |             vecs[*vecs_used].iov_base = (char*)data;
        |             ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
  

• buckets/ssl_buckets.c:570:41: warning: pointer targets in passing argument 1 of 'strlen' differ in signedness [-Wpointer-sign]
    570 |                         strlen(nm->d.ia5->data) != nm->d.ia5->length)
        |                                ~~~~~~~~~^~~~~~
        |                                         |
        |                                         unsigned char *