Update to 0.41. User-visible changes:

• make 'got ref -d' delete both loose and packed representations of the ref
• make dangling symbolic references show up in 'got ref -l'
• fix handling of slashes in got.conf repository paths
• make 'got histedit' collapse folded add+delete operations
• fix matching the first object ID listed in a pack index
• let 'got clone' try to connect to server before creating repository contents
• fix default branch name written to Git config file by 'got clone'
• allow an interrupted 'got clone' to be resumed by 'got fetch'
• handle failed connection attempts to git:// servers