Jansson 2.7 requirement in 2.5.9 breaks RHEL/CentOS 6

[Sebastian Hagedorn]

Hi,

I tried to build Cyrus 2.5.9 on CentOS 6 following this guide:

<http://cyrusimap.org/imap/installation/distributions/centos/current_stable.html#imap-installation-centos-current-stable>

It fails with this error:

libtool: link: gcc -fPIC -g -O2 -o imap/.libs/imapd imap/imap_proxy.o 
imap/imapd.o imap/mutex_fake.o imap/pushstats.o imap/proxy.o 
master/service.o  sieve/.libs/libcyrus_sieve.so imap/.libs/libcyrus_imap.so 
-luuid /root/cyrus/cyrus-imapd/lib/.libs/libcyrus_min.so 
/root/cyrus/cyrus-imapd/lib/.libs/libcyrus.so lib/.libs/libcyrus.so 
lib/.libs/libcyrus_min.so -lxml2 -lical -licalss -licalvcal -lsqlite3 
-ljansson -lsasl2 -lssl -lcrypto -lwrap -lnsl -lgssapi_krb5 -lkrb5 
-lk5crypto -lcom_err -lkrb5support -lpcre -lpcreposix -lz
imap/.libs/libcyrus_imap.so: undefined reference to `json_boolean_value'

`json_boolean_value'  is new in Jansson 2.7, but CentOS 6 only has Jansson 
2.6
-- 
    .:.Sebastian Hagedorn - Weyertal 121 (Gebäude 133), Zimmer 2.02.:.
                 .:.Regionales Rechenzentrum (RRZK).:.
   .:.Universität zu Köln / Cologne University - ✆ +49-221-470-89578.:.
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