add CURLOPT_MAXAGE_CONN

Added const for `CURLOPT_MAXAGE_CONN` definition and exported it.
Useful to control how curl reuses connections.

While the other most options for long lived connections are already present, connection maxage is also critical for cases where multiplexing is enabled.

Author: tanmaykm

src/lC_common_h.jl

@@ -693,7 +693,8 @@ const CURLOPT_DNS_SHUFFLE_ADDRESSES = (UInt32)(275)
 const CURLOPT_TLS13_CIPHERS = (UInt32)(10276)
 const CURLOPT_PROXY_TLS13_CIPHERS = (UInt32)(10277)
 const CURLOPT_DISALLOW_USERNAME_IN_URL = (UInt32)(278)
-const CURLOPT_LASTENTRY = (UInt32)(279)
+const CURLOPT_MAXAGE_CONN = UInt32(288)
+const CURLOPT_LASTENTRY = (UInt32)(10299)
 # end enum CURLoption
 
 const CURLOPT_XFERINFODATA = CURLOPT_PROGRESSDATA

src/lC_exports_h.jl

@@ -1249,3 +1249,4 @@ export CURL_CSELECT_OUT
 export CURL_CSELECT_ERR
 export CURL_PUSH_OK
 export CURL_PUSH_DENY
+export CURLOPT_MAXAGE_CONN