uninitialized pointer
invalid sizeof
fix memory leak in table_passwd
fix FILE* leak
cast computation to match format string
missing return value
in scheduler_ramnqueue, proper check of evp->type
fix warnings caused by unused variables
relay->backupname could be empty
untaint arg passed to execlp
fix unsafe tempfail
fix enqueuer
unused but we don't want to forget
bsnprintf -> snprintf in queue_api
fix show_offline_envelope
cosmethic
Add a "smtpname" field on envelopes to remember the server name
advertised during the smtp session that lead to the creation of
an envelope.

Existing on-disk envelopes that don't have that field will have
it set to the default server name on load.
Use the original smtpname as helo and domain when reinjecting a bounce.
Plug a few leaks while there.
Document "show hosts" and "show relays".
Tweak the "show hosts" output while there.