pspg suppports mysql too

I fixed some issues, and now the pspg can be used with mysql

MariaDB [(none)]> use sakila
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

MariaDB [sakila]> pager ~/src/pspg-master/pspg -s 2 -X
PAGER set to '~/src/pspg-master/pspg -s 2 -X'

MariaDB [sakila]> select * from nicer_but_slower_film_list limit 10;