haproxy: update to 1.5.12

haproxy: update to 1.5.12
[RELEASE] Released version 1.5.12

    Released version 1.5.12 with the following main changes :
        - BUG/MINOR: ssl: Display correct filename in error message
        - DOC: Fix L4TOUT typo in documentation
        - BUG/MEDIUM: Do not consider an agent check as failed on L7 error
        - BUG/MINOR: pattern: error message missing
        - BUG/MEDIUM: pattern: some entries are not deleted with case insensitive match
        - BUG/MEDIUM: buffer: one byte miss in buffer free space check
        - BUG/MAJOR: http: don't read past buffer's end in http_replace_value
        - BUG/MEDIUM: http: the function "(req|res)-replace-value" doesn't respect the HTTP syntax
        - BUG/MEDIUM: peers: correctly configure the client timeout
        - BUG/MINOR: compression: consider the expansion factor in init
        - BUG/MEDIUM: http: hdr_cnt would not count any header when called without name
        - BUG/MEDIUM: listener: don't report an error when resuming unbound listeners
        - BUG/MEDIUM: init: don't limit cpu-map to the first 32 processes only
        - BUG/MEDIUM: stream-int: always reset si->ops when si->end is nullified
        - BUG/MEDIUM: http: remove content-length from chunked messages
        - DOC: http: update the comments about the rules for determining transfer-length
        - BUG/MEDIUM: http: do not restrict parsing of transfer-encoding to HTTP/1.1
        - BUG/MEDIUM: http: incorrect transfer-coding in the request is a bad request
        - BUG/MEDIUM: http: remove content-length form responses with bad transfer-encoding
        - MEDIUM: http: restrict the HTTP version token to 1 digit as per RFC7230
        - MEDIUM: http: add option-ignore-probes to get rid of the floods of 408
        - BUG/MINOR: config: clear proxy->table.peers.p for disabled proxies
        - MINOR: stick-table: don't attach to peers in stopped state
        - MEDIUM: config: initialize stick-tables after peers, not before
        - MEDIUM: peers: add the ability to disable a peers section
        - DOC: document option http-ignore-probes
        - DOC: fix the comments about the meaning of msg->sol in HTTP
        - BUG/MEDIUM: http: wait for the exact amount of body bytes in wait_for_request_body
        - BUG/MAJOR: http: prevent risk of reading past end with balance url_param
        - DOC: update the doc on the proxy protocol

Signed-off-by: heil <heil@terminal-consulting.de>