sudo_auth_init: Fix setting FLAG_ONEANDONLY if only one auth method enabled

sudo_rfc1938_setup: fix out of bounds read if the prompt is ""

Additional variables for initial_badenv_table[]

Clear afs key and token before returning and fix comment after #endif

bsdauth_verify: restore SIGCHLD signal handler on asprintf() failure

bsdauth_init/bsdauth_cleanup: auth_close() may not be passed NULL

cvtsudoers_make_gritem: fix off-by-one in gr_mem allocation

Fix error message for files included by @includedir

get_execve_info: pass correct name to proc_read_link()

get_execve_info: read /proc/self/fd/N link for pathname

cvtsudoers_make_grlist_item: fix heap overflow on reallocation

vlog_warning: plug a memory leak

find_path: collapse extra "/" and "./" components in the command path

tgetpass: Use cbreak mode if possible even if pwfeedback is disabled

log_server_exit: log_server_close() expects the raw wait status