Steps for updating the exit routine code sample

To update the exit routine code sample, pkiexit.c, perform the following steps:

Copy the sample exit routine and makefile to the current directory by entering the following commands:
```
cp /usr/lpp/pkiserv/samples/pkiexit.c pkiexit.c
cp /usr/lpp/pkiserv/samples/Makefile.pkiexit Makefile
```
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Compile and link to produce the executable program, pkiexit, by entering the following command:
```
make
```
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Move the executable program to its execution directory and set the permissions by entering the following commands:
```
mv pkiexit /full-directory-name
chmod 755 /full-directory-name/pkiexit
```
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Edit the PKI Services environment variables file by entering the following command:
```
oedit /etc/pkiserv/pkiserv.envars
```
and add the environment variable _PKISERV_EXIT by adding the following line to the file:
```
_PKISERV_EXIT=/full-directory-name/pkiexit
```
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