Refactoring external resources download warn messages

Holding the message to be displayed when Apache is ready to write on the
error_log instead of the default output. Regression tests were added.
Adds missing 'ModSecurity:' prefix to log messages

As reported by Walter Hop, the status call functionality was printing a message
in the console without the expected 'ModSecurity:' prefix. SecServerSignature
was also printing messages without the expected prefix. Both are fixed by this
commit.
Informs problems and successfully loaded external resources during reload

Resources load mechanism as the SecRemoteRuels were not showing information
about the loaded rules while Apache was reloaded. This patch add such
information to reload in the same way that it was showing on restart.
Fix typo on fuzzy hash match message

Replaced "Socore" with Score.
Reducing the amount of compilation warnings
Disables mlogc compilation with Curl was not found

This commit automatic disables Curl compilation if Curl development files were
not found on build machine.