autotools: restore HAVE_IOCTL_* detections
#12008
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This restores `CURL_CHECK_FUNC_IOCTL` detection. I deleted it in 4d73854 and c345665 (2022-08), because the `HAVE_IOCTL` result it generated was unused in the source. But, I missed the fact that this had two dependent checks: `CURL_CHECK_FUNC_IOCTL_FIONBIO`, `CURL_CHECK_FUNC_IOCTL_SIOCGIFADDR` that we do actually need: `HAVE_IOCTL_FIONBIO`, `HAVE_IOCTL_SIOCGIFADDR`. Ref: curl#11964 (effort to sync cmake detections with autotools) Closes #xxxxx
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This restores
CURL_CHECK_FUNC_IOCTLdetection. I deleted it in4d73854 and c345665 (2022-08), because the
HAVE_IOCTLresult it generated was unused in the source. But,
I did miss the fact that this had two dependent checks:
CURL_CHECK_FUNC_IOCTL_FIONBIO,CURL_CHECK_FUNC_IOCTL_SIOCGIFADDRthat we do actually need:HAVE_IOCTL_FIONBIO,HAVE_IOCTL_SIOCGIFADDR.Regression from 4d73854
Ref: #11964 (effort to sync cmake detections with autotools)
Closes #12008