Use curl instead of wget as default fetch program

We used to prefer wget 1.16 because it has --show-progress which results in
nicer progress. But experience shows that wget is quite unreliable plus with
bdep always using curl, it would be strange to use both curl and wget (and
expecting the user to setup proxy, authentication, etc., for both).

Also add internal --curl* options to be used by bdep.

1 files changed, 8 insertions, 2 deletions

diff --git a/bpkg/common.cli b/bpkg/common.cli
index d62633a..ac045d0 100644
--- a/bpkg/common.cli
+++ b/bpkg/common.cli
@@ -167,8 +167,7 @@ namespace bpkg
 
        If the fetch program is not specified, then \cb{bpkg} will try to
        discover if one of the above programs is available and use that.
-       Currently, \cb{bpkg} has the following preference order: \cb{wget}
-       1.16 or higher (supports \cb{--show-progress}), \cb{curl},
+       Currently, \cb{bpkg} has the following preference order: \cb{curl},
        \cb{wget}, and \cb{fetch}."
     }
 
@@ -180,6 +179,13 @@ namespace bpkg
        specify multiple fetch options."
     }
 
+    // Undocumented equivalents to bdep's --curl* options. We "merge" them
+    // into --fetch/--fetch-option in an ad hoc manner (see fetch.cxx for
+    // details).
+    //
+    path --curl;
+    strings --curl-option;
+
     size_t --fetch-timeout
     {
       "<sec>",