Since we (unexpectedly for me) seem to support BLR > 64KB, I'm committing a workaround for CORE-4113 (EXECUTE BLOCK prepare fails). The debug info does not support longish BLR, so don't pretend to find something there beyond the 64KB limit. If someone can think of a better solution, please jump in.

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/branches/B2_5_Release@58167 65644016-39b1-43b1-bf79-96bc8fe82c15
Backported fix for CORE-3942: Restore from gbak backup using service doesn't report an error

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/branches/B2_5_Release@58171 65644016-39b1-43b1-bf79-96bc8fe82c15