Fix for the zerofil issue on MariaDB 10.3.13

[dveeden]

trafficstars

Closes #304

[gregoa]

8b5ba5f9c8d239328ecbc862aba203d44819e2f5 indeed works on Debian with MariaDB 10.3.13 and also MySQL 5.7.24. Great!

If I add 492e2a62c4f34f967a099d736a264e2f904f5f30 on top of it, it fails with MariaDB 10.3.13:

#   Failed test at t/rt118977-zerofill.t line 22.
#          got: '1'
#     expected: '00001'
# Looks like you failed 1 test of 8.
t/rt118977-zerofill.t ................... 
1..8
ok 1
ok 2
ok 3
ok 4
ok 5
ok 6
ok 7
not ok 8
Dubious, test returned 1 (wstat 256, 0x100)
Failed 1/8 subtests 

(and the same for MySQL 5.7.24). Looks like the MariaDB failure is also on Travis, and MySQL 5.7.24 isn't tested there.

[dveeden]

In master compiling against MariaDB client libs is no longer supported. Use DBD::MariaDB for MariaDB.