need to call toString(), implicit call to __toString doesn't work in all cases (weather service is one of that)
Exclude BC breaking PHP versions.
Merge branch 'pecl_http_fix' of git://github.com/BigMichi1/horde into BigMichi1-pecl_http_fix
[jan] Always cast reponse body to string with pecl_http 2.0 (Michael Cramer <michael@bigmichi1.de>).