Optional environment variable MPG123_MODDIR to replace the compiled-in PKGLIBDIR for finding modules... still, a module build does not work from the source directory and that sucks.
Optional environment variable MPG123_MODDIR to replace the compiled-in PKGLIBDIR for finding modules... still, a module build does not work from the source directory and that sucks.

git-svn-id: 793bb72743a407948e3701719c462b6a765bc435@1887 35dc7657-300d-0410-a2e5-dc2837fedb53

Distrotech/mpg123,Distrotech/mpg123,Distrotech/mpg123,Distrotech/mpg123,Distrotech/mpg123,Distrotech/mpg123,Distrotech/mpg123