[RELEASE] Released version 1.3.14.3

[RELEASE] Released version 1.3.14.3

Released version 1.3.14.3 with the following main changes :
    - [BUG]: Restore clearing t->logs.bytes
    - [DOC] Update a "contrib" file with a hint about a scheme used for formathing subjects
    - [BUG] Don't increment server connections too much + fix retries
    - [BUG] appsession lookup in URL does not work
    - [MINOR] report correct section type for unknown keywords.
    - [BUILD] update MacOS Makefile to build on newer versions
    - [DOC] fix erroneous "useallbackups" option in the doc
    - [DOC] applied small fixes from early readers
    - [BUG] failed conns were sometimes incremented in the frontend!
    - [TESTS] add test-pollers.cfg to easily report pollers in use
    - [BUILD] ensure that makefile understands USE_DLMALLOC=1
    - [CLEANUP] update .gitignore to ignore more temporary files
    - [CLEANUP] report dlmalloc's source path only if explictly specified
    - [BUG] str2sun could leak a small buffer in case of error during parsing
    - [BUG] option allbackups was not working anymore in roundrobin mode