please simplify shebang to #!perl

[jonassmedegaard]

Shebang of script bin/solid_auth.pl is currently #!/usr/bin/env perl.
That means it will always use default system-shared perl interpreter.

Please change that to #!perl which will be handled specially by the install routines to a) use specific perl interpreter during build, and b) expand to hardcode system-shared perl interpreter during install.

[phochste]

Thanks. Will be added to the next release