libpq.so.2.2 & libpq.so.3.0

Hi All

while upgrading from 7.3 to 7.3.1 i noticed that php complain that it cant
find libqp.so.2.2

what is the diffrence between 2.2 & 3.0 ?

will i have to recompile the php module or it will be safe to leave the old
library alog side the new ?

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