http ioengine uses deprecated functions

[vincentkfu]

The http ioengine no longer builds on newer distributions because it uses deprecated functions. Here is the related config.log output:

Compiling test case curl-new-ssl
gcc -D_GNU_SOURCE -include config-host.h -Werror -Werror-implicit-function-declaration -o /tmp/fio-conf-14769-21457-3596.exe /tmp/fio-conf-18565-21457-27555.c -lcurl -lssl -lcrypto -lnuma -lz
/tmp/fio-conf-18565-21457-27555.c: In function 'main':
/tmp/fio-conf-18565-21457-27555.c:12:3: error: 'HMAC_CTX_new' is deprecated: Since OpenSSL 3.0 [-Werror=deprecated-declarations]
   12 |   ctx = HMAC_CTX_new();
      |   ^~~
In file included from /tmp/fio-conf-18565-21457-27555.c:2:
/usr/include/openssl/hmac.h:33:33: note: declared here
   33 | OSSL_DEPRECATEDIN_3_0 HMAC_CTX *HMAC_CTX_new(void);
      |                                 ^~~~~~~~~~~~
/tmp/fio-conf-18565-21457-27555.c:13:3: error: 'HMAC_CTX_reset' is deprecated: Since OpenSSL 3.0 [-Werror=deprecated-declarations]
   13 |   HMAC_CTX_reset(ctx);
      |   ^~~~~~~~~~~~~~
/usr/include/openssl/hmac.h:34:27: note: declared here
   34 | OSSL_DEPRECATEDIN_3_0 int HMAC_CTX_reset(HMAC_CTX *ctx);
      |                           ^~~~~~~~~~~~~~
/tmp/fio-conf-18565-21457-27555.c:14:3: error: 'HMAC_CTX_free' is deprecated: Since OpenSSL 3.0 [-Werror=deprecated-declarations]
   14 |   HMAC_CTX_free(ctx);
      |   ^~~~~~~~~~~~~
/usr/include/openssl/hmac.h:35:28: note: declared here
   35 | OSSL_DEPRECATEDIN_3_0 void HMAC_CTX_free(HMAC_CTX *ctx);
      |                            ^~~~~~~~~~~~~
cc1: all warnings being treated as errors
Compiling test case curl-old-ssl
gcc -D_GNU_SOURCE -include config-host.h -Werror -Werror-implicit-function-declaration -o /tmp/fio-conf-14769-21457-3596.exe /tmp/fio-conf-18565-21457-27555.c -lcurl -lssl -lcrypto -lnuma -lz
/tmp/fio-conf-18565-21457-27555.c: In function 'main':
FIO_VERSION = fio-3.37
/tmp/fio-conf-18565-21457-27555.c:7:12: error: storage size of 'ctx' isn't known
    7 |   HMAC_CTX ctx;
      |            ^~~
/tmp/fio-conf-18565-21457-27555.c:12:3: error: implicit declaration of function 'HMAC_CTX_init'; did you mean 'HMAC_CTX_new'? [-Wimplicit-function-declaration]
   12 |   HMAC_CTX_init(&ctx);
      |   ^~~~~~~~~~~~~
      |   HMAC_CTX_new
/tmp/fio-conf-18565-21457-27555.c:13:3: error: implicit declaration of function 'HMAC_CTX_cleanup' [-Wimplicit-function-declaration]
   13 |   HMAC_CTX_cleanup(&ctx);
      |   ^~~~~~~~~~~~~~~~

Someone who uses this ioengine should update it to stop using deprecated functions and update the configure script.