Bug in nmcli when reading long secrets
$ valgrind nmcli --ask connection up vpn1
A password is required to connect to 'vpn1'.
Certificate password (vpn.secrets.cert-pass): •••••••• [enter more than 1200 chars]
==22640== at 0x4C34C36: bcmp (vg_replace_strmem.c:1100)
==22640== by 0x5AAD6BC: ??? (in /usr/lib64/libreadline.so.7.0)
==22640== by 0x5AAF7DA: rl_redisplay (in /usr/lib64/libreadline.so.7.0)
==22640== by 0x416949: nmc_secret_redisplay (common.c:963)
==22640== by 0x5A9BE26: _rl_internal_char_cleanup (in /usr/lib64/libreadline.so.7.0)
==22640== by 0x5A9C74A: readline_internal_char (in /usr/lib64/libreadline.so.7.0)
==22640== by 0x5AB5014: rl_callback_read_char (in /usr/lib64/libreadline.so.7.0)
==22640== by 0x4166B8: stdin_ready_cb (common.c:845)
==22640== by 0x57B98AC: g_main_dispatch (gmain.c:3177)
==22640== by 0x57B98AC: g_main_context_dispatch (gmain.c:3830)
==22640== by 0x57B9C77: g_main_context_iterate.isra.21 (gmain.c:3903)
==22640== by 0x57B9D0F: g_main_context_iteration (gmain.c:3964)
==22640== by 0x416754: nmc_readline_helper (common.c:869)