TAlienFile::Open passes now to the server the content of ALIEN_SITE variable if this is defined (Costin Grigoras)
(cherry picked from commit 9f0ae59c920193f6e2dce405dca5051ea9a2011e)
Fixed data race in TGeoPgon
(cherry picked from commit f3a25819d09192fa5bf9c4608ffc541d86f968af)