* misc.c (pct_expando): %t means extension, not name ("jpg", not "jpeg").
* keyserver.c (keyserver_spawn), photoid.c (show_photos), exec.h, exec.c:
Allow the caller to determine the temp file extension when starting an
exec_write and change all callers.
execution. --disable-exec implies --disable-ldap and --disable-mailto.
Also look in /usr/lib for sendmail. If sendmail is not found, do not
default - just fail.
* exec.c: Provide stubs for exec_ functions when NO_EXEC is defined.
When key signing with multiple keys at the same time, make sure each key
gets the sigclass prompt
Close the iobuf and FILE before trying to reap the child process to
encourage the child to exit
Disable cache-on-close of the fd iobuf (shouldn't all fd iobufs not be
cached?)
