fossil needs readline dependency

[ryandesign (Ryan Carsten Schmidt)]

fossil links with readline but does not declare a dependency on it.

$ otool -L /opt/local/bin/fossil
/opt/local/bin/fossil:
	/opt/local/lib/libz.1.dylib (compatibility version 1.0.0, current version 1.2.5)
	/opt/local/lib/libssl.1.0.0.dylib (compatibility version 1.0.0, current version 1.0.0)
	/opt/local/lib/libcrypto.1.0.0.dylib (compatibility version 1.0.0, current version 1.0.0)
	/opt/local/lib/libreadline.6.2.dylib (compatibility version 6.0.0, current version 6.2.0)
	/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 125.2.11)
$ port rdeps fossil
The following ports are dependencies of fossil @1.20_0+universal:
  tcl
  zlib
  openssl

[ryandesign (Ryan Carsten Schmidt)]

proposed patch

[ci42]

Replying to ryandesign@…:

fossil links with readline but does not declare a dependency on it.

Thanks for your patch. I made readline support an optional variant in r87561. It is only used in the 'fossil sqlite3' command which starts an sqlite command-line shell on the repository database. This is potential dangerous command which could corrupt the repository if not used carefully. It is mainly for debugging purposes, ommitting readline support for the sqllite command-line shell should not affect normal users. Additionally, if not linked against readline, it allows fossil to be binary distributable, avoiding the openssl/gpl conflict.