How to get log messages *after* one tag up to another tag

[Palle Girgensohn]

Hi!

I want to get a list of all changelog messages for a certain release of a 
piece of software.

Say I have a tag rel_5_0_1 and another (later) tag rel_5_0_2

Now, I need a list of all changes made after rel_5_0_1 up to the rel_5_0_2 
tag, i.e. all changes added in release 5.0.2.

I can't get cvs to do this easily, which puzzles me. Also, I have not found 
any tool to this, which is even more confusing. IMO, this should be a very 
common requirement?

I guess I could write a script that starts with rdiff, gets the versions 
for each modified file in the two tags, and loop through them to get the 
log messages, and the remove (!) the bottom message, since it belongs to 
the last commit before rel_5_0_1. But, this is clusmy, error prone and 
hackish. There must be a better way, no?

Regards,
Palle