harishbsam

Hello, Is it possible to backport the message concurrency [data race fix](https://github.com/CESNET/libnetconf2/commit/54f142a494cb896a925fa8508d1ef29ad82d0486#diff-903594ebdb0bcfef6fce31cb6bab71a459111a1f1adcddb3e79fdf2cb44c0e6b) made in v2.0.17 to v1.1.26. We are using v1.1.26 version of libnetconf2 and would like get a fix...