docs: use "currently" for the present time

In many languages, the adverb with the root "actual" means "at the
present time."  However, this usage is considered dated or even archaic
in English, and for referring to events occurring at the present time,
we usually prefer "currently" or "presently".  "Actually" is commonly
used in modern English only for the meaning of "in fact" or to express a
contrast with what is expected.

Since the documentation refers to the available options at the present
time (that is, at the time of writing) instead of drawing a contrast,
let's switch to "currently," which both is commonly used and sounds less
formal than "presently."

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/config/http.txt

@@ -71,7 +71,7 @@ http.saveCookies::
 http.version::
 	Use the specified HTTP protocol version when communicating with a server.
 	If you want to force the default. The available and default version depend
-	on libcurl. Actually the possible values of
+	on libcurl. Currently the possible values of
 	this option are:
 
 	- HTTP/2
@@ -84,7 +84,7 @@ http.sslVersion::
 	particular configuration of the crypto library in use. Internally
 	this sets the 'CURLOPT_SSL_VERSION' option; see the libcurl
 	documentation for more details on the format of this option and
-	for the ssl version supported. Actually the possible values of
+	for the ssl version supported. Currently the possible values of
 	this option are:
 
 	- sslv2