scripts: add possibility to not override default connection timeout

Allow '-1' to be specified as CONNECTION_TIMEOUT to disable the use
of the connection timeout for wget.

Signed-off-by: Cody P Schafer <dev@codyps.com>
Message-Id: <cb33f8c2cbaf802d4f04.1399687632@localhost>
Patchwork-Id: 347582

config/global/download.in

@@ -47,6 +47,8 @@ config CONNECT_TIMEOUT
       
       Note that this value applies equally to wget if you have that installed.
 
+      If '-1' is specified, no timeout reconfiguration options are passed to wget/curl.
+
 config ONLY_DOWNLOAD
     bool
     prompt "Stop after downloading tarballs"

scripts/functions

@@ -572,9 +572,14 @@ CT_DoGetFile() {
     # not easy to detect them, so force a global ${CT_CONNECT_TIMEOUT}-second
     # timeout.
     # For curl, no good progress indicator is available. So, be silent.
+    if [ ${CT_CONNECT_TIMEOUT} = -1 ]; then
+        T=
+    else
+        T="-T ${CT_CONNECT_TIMEOUT}"
+    fi
     if CT_DoExecLog ALL wget --passive-ftp --tries=3 -nc    \
                              --progress=dot:binary          \
-                             -T ${CT_CONNECT_TIMEOUT}       \
+                             ${T}                           \
                              -O "${tmp}"                    \
                              "${url}"
     then