fix Issue 3753 - ICE(eh.c): Related to exception handling and alloca.
fix Issue 11271 - auto ref opAssign + destructor + struct literal fails
fix Issue 11265 - Segfault while calling instance method of class defined inside struct

The regression was introduced by the commit:
https://github.com/D-Programming-Language/dmd/commit/671b7c20b96b580ee1dc2b3f5e3ee66c63d079b6#diff-43282ebf5a2de5fdbcb3b5083ddf949dR147

vtbl[] calculation is essentially unrelated to the class instance size.
So, just only once initializing of vtbl[] and running semantic on member
functions is sufficient.
Merge pull request #2669 from 9rnsr/fix11271

[REG 2.063] Issue 11271 - auto ref opAssign + destructor + struct literal fails
Merge pull request #2670 from 9rnsr/fix11265

[REG2.064a] Issue 11265 - Segfault while calling instance method of class defined inside struct
Merge pull request #2630 from WalterBright/fix3753

fix Issue 3753 - ICE(eh.c): Related to exception handling and alloca.
fix Issue 11225 - Module dependency cycle causes import statements inside typeof() expressions inside templates to fail
Merge pull request #2671 from 9rnsr/fix11225

[REG2.061] Issue 11225 - Module dependency cycle causes import statements inside typeof() expressions inside templates to fail
add configuration files
Merge pull request #2674 from WalterBright/add-ini

add configuration files