feature: fixed compilation errors with nginx 1.9.1+. thanks Vadim A. …

…Misbakh-Soloviov for the original patch in FRiCKLE#38.

bugfix: use ngx_abs() instead of abs() to fix one clang warning (-Wab…

…solute-value).

bugfix: fixed compilation error with nginx 1.7.5+ because nginx 1.7.5…

…+ changes the API in the events subsystem.

tests: fixed the test case indexes in output.t.

bugfix: compilation error happened with nginx 1.5.3+ because nginx ch…

…anges the ngx_sock_ntop API. thanks an0ma1ia for the report in FRiCKLE#19.

docs: confirmed that we work with 1.2.3 and 1.3.4.

bugfix: memory leak might happen if nginx 1.1.14+ is used *and* (at l…

…east) libpq fails to connect to the remote database.

Update CHANGES (releng for 0.9).

Change-Id: I411c8bd5b24b8e5a4b7f26f84b8071ea02a16ccf
Signed-off-by: Piotr Sikora <[email protected]>

fixed compilation warnings with gcc 4.6.0.

fixed an issue regarding defining global variables in C header files:…

… we should have defined rds_rough_col_type_t as a type rather than a global variable. thanks @姜大炮.