curl does not compile with gnutls 3.6.13 to 3.7.1

[jschlatow]

I did this

For gnutls 3.6.13 and later, curl enables early data:

curl/lib/vtls/gtls.c

Lines 75 to 77 in 5ab34cb

	#if GNUTLS_VERSION_NUMBER >= 0x03060d
	#define CURL_GNUTLS_EARLY_DATA
	#endif

However, building against gnutls 3.6.13 fails at the following line because GNUTLS_NO_END_OF_EARLY_DATA was only introduced with gnutls 3.7.2.

curl/lib/vtls/gtls.c

Line 928 in 5ab34cb

init_flags |= GNUTLS_ENABLE_EARLY_DATA | GNUTLS_NO_END_OF_EARLY_DATA;

I expected the following

No response

curl/libcurl version

curl 8.20.0

operating system

any

[icing]

I'll make a PR increasing the required GnuTLS version to 3.7.2 for this feature.

[icing]

Propose #21751