GHA: enable the SSL session cache in a few builds

Closes #15989

.github/workflows/http3-linux.yml

@@ -231,7 +231,7 @@ jobs:
               LDFLAGS="-Wl,-rpath,$HOME/quictls/build/lib"
               --with-ngtcp2=$HOME/ngtcp2/build --enable-warnings --enable-werror --enable-debug --disable-ntlm
               --with-test-nghttpx="$HOME/nghttp2/build/bin/nghttpx"
-              --with-openssl=$HOME/quictls/build
+              --with-openssl=$HOME/quictls/build --enable-ssls-export
 
           - name: gnutls
             PKG_CONFIG_PATH: '$HOME/gnutls/build/lib/pkgconfig:$HOME/nghttp3/build/lib/pkgconfig:$HOME/ngtcp2/build/lib/pkgconfig:$HOME/nghttp2/build/lib/pkgconfig'
@@ -239,7 +239,7 @@ jobs:
               LDFLAGS="-Wl,-rpath,$HOME/gnutls/build/lib"
               --with-ngtcp2=$HOME/ngtcp2/build --enable-warnings --enable-werror --enable-debug
               --with-test-nghttpx="$HOME/nghttp2/build/bin/nghttpx"
-              --with-gnutls=$HOME/gnutls/build
+              --with-gnutls=$HOME/gnutls/build --enable-ssls-export
 
           - name: wolfssl
             PKG_CONFIG_PATH: '$HOME/wolfssl/build/lib/pkgconfig:$HOME/nghttp3/build/lib/pkgconfig:$HOME/ngtcp2/build/lib/pkgconfig:$HOME/nghttp2/build/lib/pkgconfig'
@@ -248,7 +248,7 @@ jobs:
               --with-ngtcp2=$HOME/ngtcp2/build --enable-warnings --enable-werror --enable-debug
               --with-test-nghttpx="$HOME/nghttp2/build/bin/nghttpx"
               --with-wolfssl=$HOME/wolfssl/build
-              --enable-ech
+              --enable-ech --enable-ssls-export
 
           - name: wolfssl
             PKG_CONFIG_PATH: '$HOME/wolfssl/build/lib/pkgconfig:$HOME/nghttp3/build/lib/pkgconfig:$HOME/ngtcp2/build/lib/pkgconfig:$HOME/nghttp2/build/lib/pkgconfig'

.github/workflows/macos.yml

@@ -152,7 +152,7 @@ jobs:
             generate: -DCURL_USE_MBEDTLS=ON -DCURL_DISABLE_LDAP=ON
           - name: 'GnuTLS !ldap krb5'
             install: gnutls nettle krb5
-            generate: -DCURL_USE_GNUTLS=ON -DCURL_USE_OPENSSL=OFF -DCURL_USE_GSSAPI=ON -DGSS_ROOT_DIR=$(brew --prefix krb5) -DCURL_DISABLE_LDAP=ON
+            generate: -DCURL_USE_GNUTLS=ON -DCURL_USE_OPENSSL=OFF -DCURL_USE_GSSAPI=ON -DGSS_ROOT_DIR=$(brew --prefix krb5) -DCURL_DISABLE_LDAP=ON -DUSE_SSLS_EXPORT=ON
           - name: 'OpenSSL torture !FTP'
             generate: -DENABLE_DEBUG=ON -DBUILD_SHARED_LIBS=OFF -DENABLE_THREADED_RESOLVER=OFF -DOPENSSL_ROOT_DIR=$(brew --prefix openssl)
             tflags: -t --shallow=25 !FTP

.github/workflows/windows.yml

@@ -581,7 +581,7 @@ jobs:
             config: >-
               -DCURL_USE_LIBSSH2=ON
               -DCURL_USE_SCHANNEL=ON  -DCURL_USE_OPENSSL=ON -DCURL_USE_MBEDTLS=ON -DCURL_USE_WOLFSSL=ON -DCURL_DEFAULT_SSL_BACKEND=schannel
-              -DCURL_USE_GSASL=ON -DUSE_WIN32_IDN=ON -DENABLE_UNICODE=ON
+              -DCURL_USE_GSASL=ON -DUSE_WIN32_IDN=ON -DENABLE_UNICODE=ON -DUSE_SSLS_EXPORT=ON
 
           - name: 'openssl'
             install: 'brotli zlib zstd libpsl nghttp2 nghttp3 openssl libssh2 pkgconf gsasl c-ares libuv krb5'
@@ -614,7 +614,7 @@ jobs:
             config: >-
               -DCURL_USE_LIBSSH2=ON
               -DCURL_USE_SCHANNEL=OFF -DCURL_USE_OPENSSL=ON -DUSE_NGTCP2=ON
-              -DCURL_CA_SEARCH_SAFE=ON
+              -DCURL_CA_SEARCH_SAFE=ON -DUSE_SSLS_EXPORT=ON
 
           - name: 'boringssl'
             install: 'brotli zlib zstd libpsl nghttp2 boringssl libssh2[core,zlib]'