Fix rand usage, typos and fields alignment

[GreyXor]

• Some typos
• Fieldalignements, some bytes saved
• Rename s receiver to c to match others one
• Use NewSource instead of deprecated Seed (more info)
• Simplify (token)(v)

fieldalignements details

/home/greyxor/Documents/Projects/imcache/cleaner.go:21:14: struct with 32 pointer bytes could be 16
/home/greyxor/Documents/Projects/imcache/entry.go:6:33: struct with 40 pointer bytes could be 24
/home/greyxor/Documents/Projects/imcache/imcache.go:71:33: struct of size 80 could be 72
/home/greyxor/Documents/Projects/imcache/imcache.go:675:35: struct with 56 pointer bytes could be 32
/home/greyxor/Documents/Projects/imcache/entry_test.go:9:13: struct with 80 pointer bytes could be 72
/home/greyxor/Documents/Projects/imcache/entry_test.go:42:13: struct with 56 pointer bytes could be 48
/home/greyxor/Documents/Projects/imcache/entry_test.go:71:13: struct with 56 pointer bytes could be 48
/home/greyxor/Documents/Projects/imcache/entry_test.go:104:13: struct with 56 pointer bytes could be 48
/home/greyxor/Documents/Projects/imcache/entry_test.go:134:13: struct with 136 pointer bytes could be 112
/home/greyxor/Documents/Projects/imcache/imcache_test.go:36:16: struct with 24 pointer bytes could be 16
/home/greyxor/Documents/Projects/imcache/imcache_test.go:294:14: struct with 24 pointer bytes could be 16
/home/greyxor/Documents/Projects/imcache/imcache_test.go:307:13: struct with 48 pointer bytes could be 40
/home/greyxor/Documents/Projects/imcache/imcache_test.go:359:13: struct with 72 pointer bytes could be 64
/home/greyxor/Documents/Projects/imcache/imcache_test.go:586:14: struct with 24 pointer bytes could be 16
/home/greyxor/Documents/Projects/imcache/imcache_test.go:623:14: struct with 24 pointer bytes could be 16
/home/greyxor/Documents/Projects/imcache/imcache_test.go:670:27: struct with 32 pointer bytes could be 24
/home/greyxor/Documents/Projects/imcache/imcache_test.go:676:27: struct with 16 pointer bytes could be 8
/home/greyxor/Documents/Projects/imcache/imcache_test.go:742:14: struct with 24 pointer bytes could be 16
/home/greyxor/Documents/Projects/imcache/imcache_test.go:778:14: struct with 24 pointer bytes could be 16
/home/greyxor/Documents/Projects/imcache/imcache_test.go:809:14: struct with 24 pointer bytes could be 16
/home/greyxor/Documents/Projects/imcache/imcache_test.go:870:36: struct with 24 pointer bytes could be 16
/home/greyxor/Documents/Projects/imcache/imcache_test.go:1369:13: struct with 24 pointer bytes could be 16
/home/greyxor/Documents/Projects/imcache/imcache_test.go:1530:14: struct with 24 pointer bytes could be 16
/home/greyxor/Documents/Projects/imcache/entry_test.go:9:13: struct with 72 pointer bytes could be 64
/home/greyxor/Documents/Projects/imcache/entry_test.go:42:13: struct with 48 pointer bytes could be 40
/home/greyxor/Documents/Projects/imcache/entry_test.go:71:13: struct with 48 pointer bytes could be 40
/home/greyxor/Documents/Projects/imcache/entry_test.go:104:13: struct with 48 pointer bytes could be 40
/home/greyxor/Documents/Projects/imcache/entry_test.go:134:13: struct with 112 pointer bytes could be 104

[erni27]

@GreyXor: Thanks for the PR! 🚀

[GreyXor]

@GreyXor: Thanks for the PR! rocket

Thanks for both imcache and your reactivity