note that the problem is config wizard not starting with bcmath missing. bcmath is not required for wizard, thus it should proceed and inform about missing functionality on step 3, requirement check
<Slava> As i understand, the wizard in step 3, if some modules are unavailable, should show to user warning about missing functionality and process to next step?? This apply only to bcmath module or can be applied to some other modules?

<richlv> it might be relevant with other modules too. basically, we should get to that step in the wizard with the absolute minimum of modules required.
if possible, not trying to use 'date.timezone' till that step also would be preferable

(1) We shouldn't ignore the bc math check at that step, zabbix can't work without it. What we need to do is make sure the user can reach step 3 to figure out, what modules he needs, without causing a fatal error.
<SlaVa>RESOLVED

<pavels> Please, review my commits r23970 and r23971. After that you can merge. CLOSED.
<Slava> CLOSED

TESTED.

fixed in revision 23980