[RELEASE] Released version 1.4.5

[RELEASE] Released version 1.4.5

Released version 1.4.5 with the following main changes :
    - [DOC] report minimum kernel version for tproxy in the Makefile
    - [MINOR] add the "ignore-persist" option to conditionally ignore persistence
    - [DOC] add the "ignore-persist" option to conditionally ignore persistence
    - [DOC] fix ignore-persist/force-persist documentation
    - [BUG] cttproxy: socket fd leakage in check_cttproxy_version
    - [DOC] doc/configuration.txt: fix typos
    - [MINOR] option http-pretend-keepalive is both for FEs and BEs
    - [MINOR] fix possible crash in debug mode with invalid responses
    - [MINOR] halog: add support for statisticts on status codes
    - [OPTIM] halog: use a faster zero test in fgets()
    - [OPTIM] halog: minor speedup by using unlikely()
    - [OPTIM] halog: speed up fgets2-64 by about 10%
    - [DOC] refresh the README file and merge the CONTRIB file into it
    - [MINOR] acl: support loading values from files
    - [MEDIUM] ebtree: upgrade to version 6.0
    - [MINOR] acl trees: add flags and union members to store values in trees
    - [MEDIUM] acl: add ability to insert patterns in trees
    - [MEDIUM] acl: add tree-based lookups of exact strings
    - [MEDIUM] acl: add tree-based lookups of networks
    - [MINOR] acl: ignore empty lines and comments in pattern files
    - [MINOR] stick-tables: add support for "stick on hdr"