## Constants:
-* ASYNCHDNS
+* ASYNCHDNS
Whether libcurl supports asynchronous domain name resolution.
-* GSSAPI
+* GSSAPI
Whether libcurl supports the Generic Security Services Application Program Interface. Available if libcurl is v7.38.0 or more recent.
-* GSSNEGOTIATE
+* GSSNEGOTIATE
Whether libcurl supports HTTP Generic Security Services negotiation.
-* HTTP2
+* HTTP2
Whether libcurl supports the HTTP/2 protocol. Available if libcurl is v7.33.0 or more recent.
-* IDN
+* IDN
Whether libcurl supports international domain names.
-* IPV6
+* IPV6
Whether libcurl supports IPv6.
-* KERBEROS4
+* KERBEROS4
Whether libcurl supports the old Kerberos protocol.
-* KERBEROS5
+* KERBEROS5
Whether libcurl supports the more recent Kerberos v5 protocol. Available if libcurl is v7.40.0 or more recent.
-* LARGEFILE
+* LARGEFILE
Whether libcurl supports large files.
-* LIBZ
+* LIBZ
Whether libcurl supports gzip/deflate compression.
-* NTLM
+* NTLM
Whether libcurl supports the NT Lan Manager authentication.
-* NTLM_WB
+* NTLM_WB
Whether libcurl supports NTLM delegation to a winbind helper. Available if libcurl is v7.22.0 or more recent.
-* PSL
+* PSL
Whether libcurl supports the Public Suffix List for cookie host handling. Available if libcurl is v7.47.0 or more recent.
-* SPNEGO
+* SPNEGO
Whether libcurl supports the Simple and Protected GSSAPI Negotiation Mechanism.
-* SSL
+* SSL
Whether libcurl supports SSL/TLS protocols.
-* SSPI
+* SSPI
Whether libcurl supports the Security Support Provider Interface.
-* TLSAUTH_SRP
+* TLSAUTH_SRP
Whether libcurl supports TLS Secure Remote Password authentication. Available if libcurl is v7.21.4 or more recent.
-* UNIX_SOCKETS
+* UNIX_SOCKETS
Whether libcurl supports connections to unix sockets. Available if libcurl is v7.40.0 or more recent.