Update main/monodevelop.spec.in

- SPDX license specifications
- add missing dependencies
- update configure switches
- fix file listing
Merge pull request #240 from Mailaender/patch-2

fix RPM spec file
Bump md-addins for an android fix
Revert "[Core] Cleanup to previous commit"

This reverts commit d68282dd2ea1610f185259354cb3df4d1d546491.
Revert "[Core] Improved perf of Project.Files.GetFile() and GetFileWithVirtualPath()"

This reverts commit 5ac5a74482e98dcb23f65df240e893cd42b4970f.