Forked version of sradownloader v3.11.
I added the option to select Axel, FTP, or wget to download the files from the ENA database.
New options:
--axel-connections AXEL_NUM_CONNECTIONS
Number of connections to use with axel (default 10)
--ftp Use FTP to download from ENA (default)
--wget Use wget to download from ENA
--axel Use axel to download from ENA