fix Issue 5878 - Forward reference in returning superclass from template using is() expression
fix Issue 9890 - Alias This + Alias Fields
fix Issue 9903 - Broken ddoc in std.typecons and etc.c.sqlite3
Merge pull request #1872 from 9rnsr/fix9903

[REG2.061] Issue 9903 - Broken ddoc in std.typecons and etc.c.sqlite3
Merge pull request #1867 from 9rnsr/fix9890

[REG2.061] Issue 9890 - Alias This + Alias Fields
Merge pull request #1859 from 9rnsr/fix5878

Issue 5878 - Forward reference in returning superclass from template using is() expression