REGTESTS: test case for map_regm commit 271022150d

Minimal test case for map_regm commit 271022150d7961b9aa39dbfd88e0c6a4bc48c3ee.
Config and test is adapted from: Daniel Schneller's example
(https://www.mail-archive.com/haproxy@formilux.org/msg30523.html).
2 files changed