Need some sed/awk/bash advice

[Patrick <shrike@xxxxxxxxxxxxxxxxx>]

Hello,

Can anyone with some decent sed/awk/bash skills please tell me how I do
some magic in a specfile:

1) replace "%define cvsdate <date in past>" with "%define cvsdate
<today's date>"

2) add the following lines after a line "%changelog"
"* Thu May 8 2003 me <me@xxxxxx>
 - autorebuild"

Thanks!
Patrick