Replace Recommends: sendmail with Recommends: /usr/sbin/sendmail
There is no need to require the sendmail package specifically as many
other packages provide a sendmail command that could be used.
Instead, Recommends: /usr/sbin/sendmail which covers any number of other
packages that provide a sendmail command.
Signed-off-by: Brian J. Murrell <brian@interlinx.bc.ca>
