[Libvir] Use of getpass

We recently added a call to getpass(3) function. Needless to say this doesn't exist on Windows. More seriously the man-page for getpass on Linux has strong exhortations not to use the function. NAME getpass - get a password SYNOPSIS #include <unistd.h> char *getpass( const char * prompt ); DESCRIPTION This function is obsolete. Do not use it. The getpass() function opens /dev/tty (the controlling terminal of the process), outputs the string prompt, turns off echoing, reads one line (the "password"), restores the terminal state and closes /dev/tty again. [...] CONFORMING TO Present in SUSv2, but marked LEGACY. Removed in POSIX.1-2001. Should we remove it? Replace it? Rich. -- Emerging Technologies, Red Hat - http://et.redhat.com/~rjones/ Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 03798903