Use AM_ prefix in Makefile.am

Fixes the build process in later versions of automake
Run coverity against master, nothing else.
Run autoconf before coverity
Only run coverity on coverity_scan branch again
Merge remote-tracking branch 'benburry/automake'
Fix udp bind port
Tagging 1.1.5
Merge tag 'upstream/1.1.5' into debian
Bump changelog to 1.1.5-1