Adds line comments denoted by # within CONTROL files.
For the moment a comment must be start with # and is valid
until the end of the line. It's not possible to add a comment
at the end of usable lines.
Signed-off-by: Tobias Kohlbau <tobias@kohlbau.de>
Added capability for CONTROL files to specify qualified dependencies, which are substring searched inside triplet names.
Fixed bug in internal 'build' command where if a package is already built, that built package's dependencies will be used to determine requirements for the build instead of the port directory's CONTROL file.