relro, stack-protector and pie compile flags
Test -D_FORTIFY_SOURCE=2 and --param ssp-buffer-size=4
Check if ragel is missing but needed and fail
Use correct macro name
Merge pull request #1675 from cmouse/fail-if-ragel-needed

Check if ragel is missing but needed and fail
Merge pull request #1670 from cmouse/relro-and-pie-flags

relro, stack-protector and pie compile flags; also makes -g default
add priority to content for MX and SVR records
remove priority from api tests
remove priority in remote backend
remove priority in recursor