[Fix #1022] Fix Fossil detection (#1028)

The fossil checkout database is named `.fslckout` or `_FOSSIL_`, not
`.fossil`. Searching for a dominating .fossil file would just find
`~/.fossil`, which is Fossil's user config database.

CHANGELOG.md

@@ -5,6 +5,7 @@
 ### Bugs fixed
 
 * [#1024](https://github.com/bbatsov/projectile/issues/1024): Do not cache ignored project files.
+* [#1022](https://github.com/bbatsov/projectile/issues/1022): Scan for Fossil's checkout DB, not its config DB
 
 ## 0.14.0 (2016-07-08)
 

projectile.el

@@ -1941,13 +1941,15 @@ PROJECT-ROOT is the targeted directory.  If nil, use
   (cond
    ((projectile-file-exists-p (expand-file-name ".git" project-root)) 'git)
    ((projectile-file-exists-p (expand-file-name ".hg" project-root)) 'hg)
-   ((projectile-file-exists-p (expand-file-name ".fossil" project-root)) 'fossil)
+   ((projectile-file-exists-p (expand-file-name ".fslckout" project-root)) 'fossil)
+   ((projectile-file-exists-p (expand-file-name "_FOSSIL_" project-root)) 'fossil)
    ((projectile-file-exists-p (expand-file-name ".bzr" project-root)) 'bzr)
    ((projectile-file-exists-p (expand-file-name "_darcs" project-root)) 'darcs)
    ((projectile-file-exists-p (expand-file-name ".svn" project-root)) 'svn)
    ((projectile-locate-dominating-file project-root ".git") 'git)
    ((projectile-locate-dominating-file project-root ".hg") 'hg)
-   ((projectile-locate-dominating-file project-root ".fossil") 'fossil)
+   ((projectile-locate-dominating-file project-root ".fslckout") 'fossil)
+   ((projectile-locate-dominating-file project-root "_FOSSIL_") 'fossil)
    ((projectile-locate-dominating-file project-root ".bzr") 'bzr)
    ((projectile-locate-dominating-file project-root "_darcs") 'darcs)
    ((projectile-locate-dominating-file project-root ".svn") 'svn)