dmd 1.058 and 2.043 release

[Walter Bright]

bearophile wrote:
> In the situation I've shown in 3972 a better error message is the two error
> messages (or something similar):
> 
> spam.d(2): Error: module 'test' has mismatched file name 'spam.d'. foo.d(2):
> Error: module 'bar' has mismatched file name 'foo.d'.


The error is not a mismatched file name, which is perfectly legitimate in D. The 
error is two different files have the same module name.