Improve default config and remove stubs

Author: shivammathur

extension/BuildPhpExtension/config/stubs/http.composer.json

@@ -35,6 +35,9 @@ Function Get-ArgumentFromConfig {
         if($ConfigW32Content.Contains("PHP_$($Extension.ToUpper())_SHARED")) {
             $argValue = "shared"
         }
+        if($Extension -eq "oci8_19" -or $Extension -eq "pdo_oci" -or $Extension -eq 'ibm_db2' -or $Extension -eq 'pdo_ibm') {
+            $argValue = "../deps,shared"
+        }
 
         $arg=''
         if($null -ne $buildArgPrefix) {

extension/BuildPhpExtension/config/stubs/ibm_db2.composer.json

@@ -97,10 +97,24 @@ Function Get-LibrariesFromConfig {
         if($Extension -eq "mongodb") {
             $foundItems = $foundItems | Where-Object {$_ -notmatch "libsasl.*"}
         }
-        # Add zlib if the extension is memcached
-        if($Extension -eq "memcached") {
+
+        # Custom mappings which are not in config.w32
+        if($Extension -eq "memcached" -or $Extension -eq "xlswriter") {
             $foundItems += "zlib"
         }
+        if($Extension -eq "oci8_19" -or $Extension -eq "pdo_oci") {
+            $foundItems += "instantclient"
+        }
+        if($Extension -eq 'ibm_db2' -or $Extension -eq 'pdo_ibm') {
+            $foundItems += 'odbc_cli'
+        }
+        if($Extension -eq 'xmlrpc') {
+            $foundItems += 'libiconv'
+            $foundItems += 'libxml2'
+        }
+        if($Extension -eq 'parallel') {
+            $foundItems += 'pthreads'
+        }
 
         $highestVersions = @{}